First let me grab your attention to the fact that Ha-ka-ma (حکم) in Arabic has two applications: to Judge and to rule. In short, no Ahlul Bayt --peace be upon them-- all were judging and ruling (at the times they were rulers of the Islamic society for example) according to the rules of Islam and obviously not the rules of Jews, even not the original incorrupted version of the rules brought to Israelite by Moses --peace be upon him.
Let bring you some Ahadeeth that explain the issue better:
source: بصائر الدرجات في فضائل آل محمد صلى الله عليهم، ج1، ص: 258,259
حَدَّثَنَا يَعْقُوبُ بْنُ يَزِيدَ عَنِ ابْنِ أَبِي عُمَيْرٍ عَنْ
مَنْصُورٍ عَنْ فُضَيْلٍ الْأَعْوَرِ عَنْ أَبِي عُبَيْدَةَ الْحَذَّاءِ
قَالَ: كُنَّا زَمَانَ أَبِي جَعْفَرٍ ع حِينَ قُبِضَ ع نَتَرَدَّدُ
كَالْغَنَمِ لَا رَاعِيَ لَهَا فَلَقِينَا سَالِمَ بْنَ أَبِي حَفْصَةَ
فَقَالَ يَا أَبَا عُبَيْدَةَ مَنْ إِمَامُكَ قُلْتُ أَئِمَّتِي مِنْ آلِ
مُحَمَّدٍ فَقَالَ هَلَكْتَ وَ أَهْلَكْتَ أَ مَا سمعته [سَمِعْتَ] وَ
أَنْتَ مَعِي أَبَا جَعْفَرٍ وَ هُوَ يَقُولُ مَنْ مَاتَ وَ لَيْسَ
عَلَيْهِ إِمَامٌ مَاتَ مِيتَةً جَاهِلِيَّةً أَ مَا تَعْرِفُ أَنَّهُ
قَدْ خَلَّفَ وَلَدَهُ جَعْفَراً إِمَاماً عَلَى الْأُمَّةِ قُلْتُ بَلَى
لَعَمْرِي قَدْ رَزَقَنِي اللَّهُ الْمَعْرِفَةَ قَالَ فَقُلْتُ لِأَبِي
عَبْدِ اللَّهِ ع بَعْدَ مَا لَقِيتُهُ إِنَّ سَالِمَ بْنَ أَبِي
حَفْصَةَ قَالَ لِي كَذَا وَ كَذَا قَالَ لِي يَا أَبَا عُبَيْدَةَ أَ
مَا عَلِمْتَ أَنَّهُ لَمْ يَمُتْ مِنَّا مَيِّتٌ حَتَّى يُخَلِّفَ مِنْ
بَعْدِهِ مَنْ يَعْمَلُ مِثْلَ عَمَلِهِ وَ يَسِيرُ بِمِثْلِ سِيرَتِهِ
وَ يَدْعُو لي [إِلَى] مِثْلِ الَّذِي دَعَا إِلَيْهِ يَا أَبَا
عُبَيْدَةَ إِنَّهُ لَمْ يُمْنَعْ مَا أُعْطِيَ دَاوُدَ أَنْ أُعْطِيَ
سُلَيْمَانَ قَالَ ثُمَّ قَالَ يَا أَبَا عُبَيْدَةَ إِنَّهُ إِذَا قَامَ
قَائِمُ آلِ مُحَمَّدٍ ص حَكَمَ بِحُكْمِ آلِ دَاوُدَ وَ كَانَ
سُلَيْمَانُ لَا يَسْأَلُ النَّاسَ بَيِّنَةً.
Abu Ubaidah said when Abu Ja3far [Imam Baqir]
--peace be upon him-- was martyred we were like a herd of sheep left without pastor. Then I met Salim ibn Abu-Hafsah, he
asked me O Aby Ubaidah, who is your Imam? I said my Imams are from the
descendants of Muhammad --peace be upon him and his household, so he
said you have then died and killed [the other people], didn't you hear while we were
together at Imam Baqir --peace be upon him-- when he said "whoever
dies and has no Imam over himself he has passed away with the death of
ignorance"? Didn't you know Imam Baqir --peace be upon him--
appointed as his successor his son Ja3far --peace be upon him? I
answered yes I swear to my life, Thereafter I was given knowledge about that by Allah. I
told Imam Sadiq --peace be upon him-- about such a conservation, so
said to me Imam Sadiq --peace be upon him: "Didn't you know that
verily didn't pass away any of us unless he appointed as his successor
one who behaves similar to him, moves regarding the inside state as
him, invite to what he was inviting toward, O Abu Ubaidah! what was
given to David was not prevented to be given to Solomonn, O Abu
Ubaidah! verily when the Qa'im from the family of Muhammad [that is,
Imam Mahdi] arises he will judge the same way the family of David were
to judge, and Solomon [the successor of David in his family] was not
asking people for their proofs and reasons"
حَدَّثَنَا أَحْمَدُ بْنُ مُحَمَّدٍ عَنِ ابْنِ سِنَانٍ عَنْ أَبَانٍ
قَالَ سَمِعْتُ أَبَا عَبْدِ اللَّهِ ع يَقُولُ لَا تَذْهَبُ الدُّنْيَا
حَتَّى يَخْرُجَ رَجُلٌ مِنِّي رَجُلٌ يَحْكُمُ بِحُكُومَةِ آلِ دَاوُدَ
وَ لَا يَسْأَلُ عَنْ بَيِّنَةٍ يُعْطِي كُلَّ نَفْسٍ حُكْمها
Imam Sadiq --peace be upon him-- once said: "Dunya will not end unless
will arise a man from my descendant who will judge with the judgement
manner of the family of David, without asking for proofs and reasons,
giving anyone his right."
حَدَّثَنَا مُحَمَّدُ بْنُ عِيسَى عَنْ مُحَمَّدِ بْنِ إِسْمَاعِيلَ عَنْ
مَنْصُورِ بْنِ يُونُسَ عَنْ فُضَيْلٍ الْأَعْوَرِ عَنْ أَبِي عُبَيْدَةَ
عَنْهُ ع قَالَ: إِذَا قَامَ قَائِمُ آلِ مُحَمَّدٍ حَكَمَ بِحُكْمِ
دَاوُدَ وَ سُلَيْمَانَ لَا يَسْأَلُ النَّاسَ بَيِّنَةً.
Imam Sadiq --peace be upon him-- said: "when the Qa'im of the family
of Muhammad [that is, Imam Mahdi] arises he will judge the same way
David and Solomon were judging, without asking people for proofs and
reasons"
حَدَّثَنَا عَبْدُ اللَّهِ بْنُ جَعْفَرٍ عَنْ مُحَمَّدِ بْنِ عِيسَى
عَنْ يُونُسَ عَنْ حَرِيزٍ قَالَ سَمِعْتُ أَبَا عَبْدِ اللَّهِ ع
يَقُولُ لَنْ تَذْهَبَ الدُّنْيَا حَتَّى يَخْرُجَ رَجُلٌ مِنَّا أَهْلَ
الْبَيْتِ يَحْكُمُ بِحُكْمِ دَاوُدَ وَ لَا يَسْأَلُ النَّاسَ
بَيِّنَةً.
Imam Sadiq --peace be upon him-- once said: "Dunya will never end
before a man from us Ahlul Bayt arises who judges with the judgement
manner of David and not asking people for proofs and reasons"
you can find the same Ahadeeth in other books as well, like in Al-Kaafi. Now read the following Ahadeeth:
source: الكافي (ط - الإسلامية)، ج1، ص: 398
مُحَمَّدٌ عَنْ أَحْمَدَ بْنِ مُحَمَّدٍ عَنِ ابْنِ مَحْبُوبٍ عَنْ
هِشَامِ بْنِ سَالِمٍ عَنْ عَمَّارٍ السَّابَاطِيِّ قَالَ: قُلْتُ
لِأَبِي عَبْدِ اللَّهِ ع بِمَا تَحْكُمُونَ إِذَا حَكَمْتُمْ قَالَ
بِحُكْمِ اللَّهِ وَ حُكْمِ دَاوُدَ فَإِذَا وَرَدَ عَلَيْنَا الشَّيْءُ
الَّذِي لَيْسَ عِنْدَنَا تَلَقَّانَا بِهِ رُوحُ الْقُدُسِ.
Imam Sadiq --peace be upon him-- was asked about how that they [Ahlul
Bayt peace be upon them] judge when they judge, he answered based on
the rules of Allah and on the manner of David, and when it comes to us
an issue knowledge about which is not with us the Holy Spirit inspires
it to us.
Note that no one claim any of the 14 infallibles, except for the holy prophet peace be upon him and his household, is a prophet or messenger, but they are the narrators (المحدثین) according to some other Ahadeeth. Also see the following Hadeeth:
source: كفاية الأثر في النص على الأئمة الإثني عشر، ص: 120-122
أَخْبَرَنَا مُحَمَّدُ بْنُ عَبْدِ اللَّهِ بْنِ الْمُطَّلِبِ
الشَّيْبَانِيُّ قَالَ حَدَّثَنَا مُحَمَّدُ بْنُ الْحُسَيْنِ بْنِ
حَفْصٍ الْخَثْعَمِيُّ الْكُوفِيُّ قَالَ حَدَّثَنَا عَبَّادُ بْنُ
يَعْقُوبَ قَالَ حَدَّثَنَا عَلِيُّ بْنُ هَاشِمٍ عَنْ مُحَمَّدِ بْنِ
عَبْدِ اللَّهِ عَنْ أَبِي عُبَيْدَةَ بْنِ مُحَمَّدِ بْنِ عَمَّارٍ عَنْ
أَبِيهِ عَنْ جَدِّهِ عَمَّارٍ قَالَ: كُنْتُ مَعَ رَسُولِ اللَّهِ ص فِي
بَعْضِ غَزَوَاتِهِ وَ قَتَلَ عَلِيٌّ ع أَصْحَابَ الْأَلْوِيَةِ وَ
فَرَّقَ جَمْعَهُمْ وَ قَتَلَ عَمْرَو بْنَ عَبْدِ اللَّهِ الْجُمَحِيَّ
وَ قَتَلَ شَيْبَةَ بْنَ نَافِعٍ أَتَيْتُ رَسُولَ اللَّهِ ص فَقُلْتُ
لَهُ يَا رَسُولَ اللَّهِ صَلَّى اللَّهُ عَلَيْكَ إِنَّ عَلِيّاً قَدْ
جَاهَدَ فِي اللَّهِ حَقَّ جِهَادِهِ فَقَالَ لِأَنَّهُ مِنِّي وَ أَنَا
مِنْهُ وَارِثُ عِلْمِي وَ قَاضِي دَيْنِي وَ مُنْجِزُ وَعْدِي وَ
الْخَلِيفَةُ بَعْدِي وَ لَوْلَاهُ لَمْ يُعْرَفِ الْمُؤْمِنُ الْمَحْضُ
حَرْبُهُ حَرْبِي وَ حَرْبِي حَرْبُ اللَّهِ وَ سِلْمُهُ سِلْمِي وَ
سِلْمِي سِلْمُ اللَّهِ أَلَا إِنَّهُ أَبُو سِبْطَيَّ وَ الْأَئِمَّةِ
مِنْ صُلْبِهِ يُخْرِجُ اللَّهُ تَعَالَى الْأَئِمَّةَ الرَّاشِدِينَ وَ
مِنْهُمْ مَهْدِيُّ هَذِهِ الْأُمَّةِ فَقُلْتُ بِأَبِي أَنْتَ وَ أُمِّي
يَا رَسُولَ اللَّهِ مَا هَذَا الْمَهْدِيُّ قَالَ يَا عَمَّارُ إِنَّ
اللَّهَ تَبَارَكَ وَ تَعَالَى عَهِدَ إِلَيَّ أَنَّهُ يُخْرِجُ مِنْ
صُلْبِ الْحُسَيْنِ تِسْعَةً وَ التَّاسِعُ مِنْ وُلْدِهِ يَغِيبُ
عَنْهُمْ وَ ذَلِكَ قَوْلُهُ عَزَّ وَ جَلَّ قُلْ أَ رَأَيْتُمْ إِنْ
أَصْبَحَ ماؤُكُمْ غَوْراً فَمَنْ يَأْتِيكُمْ بِماءٍ مَعِينٍ يَكُونُ
لَهُ غَيْبَةٌ طَوِيلَةٌ يَرْجِعُ عَنْهَا قَوْمٌ وَ يَثْبُتُ عَلَيْهَا
آخَرُونَ فَإِذَا كَانَ فِي آخِرِ الزَّمَانِ يَخْرُجُ فَيَمْلَأُ
الدُّنْيَا قِسْطاً وَ عَدْلًا وَ يُقَاتِلُ عَلَى التَّأْوِيلِ كَمَا
قَاتَلْتُ عَلَى التَّنْزِيلِ وَ هُوَ سَمِيِّي وَ أَشْبَهُ النَّاسِ بِي
يَا عَمَّارُ سَتَكُونُ بَعْدِي فِتْنَةٌ فَإِذَا كَانَ ذَلِكَ
فَاتَّبِعْ عَلِيّاً وَ حِزْبَهُ فَإِنَّهُ مَعَ الْحَقِّ وَ الْحَقَّ
مَعَهُ يَا عَمَّارُ إِنَّكَ سَتُقَاتِلُ بَعْدِي مَعَ عَلِيٍّ
صِنْفَيْنِ النَّاكِثِينَ وَ الْقَاسِطِينَ ثُمَّ تَقْتُلُكَ الْفِئَةُ
الْبَاغِيَة ...
... for him will be a long occulation a group of people will loose
their faith in him and return from him, and a group of people will
remain firm on believing in him, so when he came at the end of times
he will fill Dunya with justice and he will fight based on the
hidden meanings of Qur'aan like I fought based on the appearance of
Qur'aan ... [I only translated the related part]
In another place we have:
source: الغيبة( للنعماني)، النص، ص: 242
حَدَّثَنَا عَلِيُّ بْنُ أَحْمَدَ قَالَ حَدَّثَنَا عُبَيْدُ اللَّهِ
بْنُ مُوسَى عَنْ أَحْمَدَ بْنِ مُحَمَّدِ بْنِ خَالِدٍ عَنْ أَبِيهِ
عَنْ مُحَمَّدِ بْنِ سُلَيْمَانَ الدَّيْلَمِيِّ عَنْ أَبِي بَصِيرٍ عَنْ
أَبِي عَبْدِ اللَّهِ ع فِي قَوْلِهِ تَعَالَى يُعْرَفُ الْمُجْرِمُونَ
بِسِيماهُمْ قَالَ اللَّهُ يَعْرِفُهُمْ وَ لَكِنْ نَزَلَتْ فِي
الْقَائِمِ يَعْرِفُهُمْ بِسِيمَاهُمْ فَيَخْبِطُهُمْ بِالسَّيْفِ هُوَ
وَ أَصْحَابُهُ خَبْطاً
Imam Sadiq --peace be upon him-- said about the saying of Allah that
"the sinners will be known by their faces" that Allah knows them
but it is revealed about Qa'im, he knows them by their faces so he and
his companions will hit them with sword strongly.
The verse quoted above is a part of the following verses:
فَيَوْمَئِذٍ لَّا يُسْأَلُ عَن ذَنبِهِ إِنسٌ وَلَا جَانٌّ / فَبِأَيِّ
آلَاءِ رَبِّكُمَا تُكَذِّبَانِ / يُعْرَفُ الْمُجْرِمُونَ بِسِيمَاهُمْ
فَيُؤْخَذُ بِالنَّوَاصِي وَالْأَقْدَامِ
On that day [Qiyamah or any specific time] no question will be asked of man or Jinn as to his sin. /
Then which of the favours of your Lord will ye deny? / (For) the
sinners will be known by their marks: and they will be seized by their
forelocks and their feet. [55:39-41]
And last, only in one place I have seen explicitly stated that Imam Mahdi --peace be upon him-- will judge according to rules of Jews, see the following Hadeeth:
source: الغيبة( للنعماني)، النص، ص: 237,238
أَخْبَرَنَا عَلِيُّ بْنُ الْحُسَيْنِ قَالَ حَدَّثَنَا مُحَمَّدُ بْنُ
يَحْيَى قَالَ حَدَّثَنَا مُحَمَّدُ بْنُ حَسَّانَ الرَّازِيُّ قَالَ
حَدَّثَنَا مُحَمَّدُ بْنُ عَلِيٍّ الصَّيْرَفِيُّ عَنِ الْحَسَنِ بْنِ
مَحْبُوبٍ عَنْ عَمْرِو بْنِ شِمْرٍ عَنْ جَابِرٍ قَالَ: دَخَلَ رَجُلٌ
عَلَى أَبِي جَعْفَرٍ الْبَاقِرِ ع فَقَالَ لَهُ عَافَاكَ اللَّهُ
اقْبِضْ مِنِّي هَذِهِ الْخَمْسَمِائَةِ دِرْهَمٍ فَإِنَّهَا زَكَاةُ
مَالِي فَقَالَ لَهُ أَبُو جَعْفَرٍ ع خُذْهَا أَنْتَ فَضَعْهَا فِي
جِيرَانِكَ مِنْ أَهْلِ الْإِسْلَامِ وَ الْمَسَاكِينِ مِنْ إِخْوَانِكَ
الْمُؤْمِنِينَ ثُمَّ قَالَ إِذَا قَامَ قَائِمُ أَهْلِ الْبَيْتِ
قَسَمَ بِالسَّوِيَّةِ وَ عَدَلَ فِي الرَّعِيَّةِ فَمَنْ أَطَاعَهُ
فَقَدْ أَطاعَ اللَّهَ وَ مَنْ عَصَاهُ فَقَدْ عَصَى اللَّهَ وَ إِنَّمَا
سُمِّيَ الْمَهْدِيُّ مَهْدِيّاً لِأَنَّهُ يُهْدَى إِلَى أَمْرٍ خَفِيٍّ
وَ يَسْتَخْرِجُ التَّوْرَاةَ وَ سَائِرَ كُتُبِ اللَّهِ عَزَّ وَ جَلَّ
مِنْ غَارٍ بِأَنْطَاكِيَةَ وَ يَحْكُمُ بَيْنَ أَهْلِ التَّوْرَاةِ
بِالتَّوْرَاةِ وَ بَيْنَ أَهْلِ الْإِنْجِيلِ بِالْإِنْجِيلِ وَ بَيْنَ
أَهْلِ الزَّبُورِ بِالزَّبُورِ وَ بَيْنِ أَهْلِ الْقُرْآنِ
بِالْقُرْآنِ وَ تُجْمَعُ إِلَيْهِ أَمْوَالُ الدُّنْيَا مِنْ بَطْنِ
الْأَرْضِ وَ ظَهْرِهَا فَيَقُولُ لِلنَّاسِ تَعَالَوْا إِلَى مَا
قَطَعْتُمْ فِيهِ الْأَرْحَامَ وَ سَفَكْتُمْ فِيهِ الدِّمَاءَ
الْحَرَامَ وَ رَكِبْتُمْ فِيهِ مَا حَرَّمَ اللَّهُ عَزَّ وَ جَلَّ
فَيُعْطِي شَيْئاً لَمْ يُعْطَهُ أَحَدٌ كَانَ قَبْلَهُ وَ يَمْلَأُ
الْأَرْضَ عَدْلًا وَ قِسْطاً وَ نُوراً- كَمَا مُلِئَتْ ظُلْماً وَ
جَوْراً وَ شَرّا
It is quoted from Imam Baqir --peace be upon him-- that when the Qa'im
of the Ahlul Bayt arises he will judge between the people with
justice, so whoever that obeys him has obeyed Allah and whoever that
disobeys him has disobeyed Allah, and he is reputed as Mahdi as he
guides (Yahdi) toward the hidden massage, and will brought out to open
the original Turah and the other scriptures of Allah from a cave at
Antioch (Antakya) and judge between the people of Turah with the rules
of Turah, and between the people of Injeel with the rules of Injeel,
and between the people of Zabur with the rules of Zabur, and between
the people of Qur'aan with the rules of Qur'aan ... [only the directly
related parts are translated]
which obviously addresses a short time after his rise only as after his government settles there would exist no one unless he/she has converted to Islam according to this verse of Qur'aan:
وَإِن مِّنْ أَهْلِ الْكِتَابِ إِلَّا لَيُؤْمِنَنَّ بِهِ قَبْلَ
مَوْتِهِ ۖ وَيَوْمَ الْقِيَامَةِ يَكُونُ عَلَيْهِمْ شَهِيدًا
And there is not one of the followers of the Book but most certainly
believes in this before his death, and on the day of resurrection he
(Isa) shall be a witness against them. [4:159]
and this is also clear from the Sermon Imam --peace be upon him-- will give at the first day that he arise:
source: إلزام الناصب في إثبات الحجة الغائب عجل الله تعالى فرجه الشريف،
ج2، ص: 213
... و سيّدنا القائم مسند ظهره إلى الكعبة و يقول: يا معشر الخلائق، ألا
و من أراد أن ينظر إلى آدم و شيث، فها أنا ذا آدم و شيث ألا و من أراد أن
ينظر إلى نوح و ولده سام، فها أنا ذا نوح و سام ألا و من أراد أن ينظر
إلى إبراهيم و إسماعيل، فها أنا ذا إبراهيم و إسماعيل ألا و من أراد أن
ينظر إلى موسى و يوشع، فها أنا ذا موسى و يوشع، ألا و من أراد أن ينظر
إلى عيسى و شمعون فها أنا ذا عيسى و شمعون، ألا و من أراد أن ينظر إلى
محمّد صلّى اللّه عليه و آله و سلم و أمير المؤمنين عليه السّلام فها أنا
ذا محمّد و أمير المؤمنين، ألا و من أراد أن ينظر إلى الحسن و الحسين
عليه السّلام فها أنا ذا الحسن و الحسين، ألا و من أراد أن ينظر إلى
الأئمّة من ولد الحسين عليه السّلام فها أنا ذا الأئمّة، أجيبوا إلى
مسألتي فإنّي أنبئك بما نبئتم به و ما لم تنبّئوا به، و من كان يقرأ
الكتب و الصحف فليسمع منّي ثمّ يبتدئ بالصحف التي أنزلها اللّه على آدم و
شيث و يقول أمّة آدم و شيث هبة اللّه: هذه و اللّه هي الصحف حقّا و لقد
أرانا ما لم نكن نعلمه فيها و ما كان خفي علينا و ما كان سقط منها و بدل
و حرّف، ثمّ يقرأ صحف نوح و صحف إبراهيم و التوراة و الإنجيل و الزبور
فيقول أهل التوراة و الإنجيل و الزبور: هذه و اللّه صحف نوح و إبراهيم
حقّا و ما اسقط منها و ما بدّل و حرّف منها هذه و اللّه التوراة الجامعة
و الزبور التام و الإنجيل الكامل و إنّها أضعاف ما قرأنا منها ثمّ يتلو
القرآن فيقول المسلمون: هذا و اللّه القرآن حقّا الذي أنزل اللّه على
محمّد صلّى اللّه عليه و آله و سلم و ما اسقط منه و حرّف و بدّل ...
... and our chief Qa'im [when he arises he] will lean against Ka3bah
and say: "O group of people, whoever that wants to look at Adam and
Sheith look at me I am the most alike of the people to Adam and
Sheith, whoever that wants to look at Noah and Saam look at me I am
the most alike of the people to Noah and Saam, whoever that wants to
look at Ibrahim and Ismaa3eel look at me I am the most alike of the
people to Ibrahim and Isma3eel, whoever that wants to look at Moses
and Yushe3 look at me I am the most alike of the people to Moses and
Yushe3, whoever that wants to look at Jesus and Sham3un look at me I
am the most alike of the people to Jesus and Sham3un, whoever that
wants to look at Muhammad --peace be upon him and his household-- and
the commander or the believers --peace be upon him-- look at me I am
the most alike of the people to Muhammad and the commander or the
believers, whoever that wants to look at Al-Hassan and Al-Hussain
--peace be upon them-- look at me I am the most alike of the people to Al-Hassan and Al-Hussain, whoever that wants to look at the Imams from
the descendant of Al-Hussain --peace be upon him-- look at me I am the
most alike of the people to the Imams, come to me for me to inform you
of what they have informed and what what they have not informed, and
whoever has read the Heavenly book and scriptures come and hear their
books from me", then he starts to recite the scriptures Allah revealed
down to Adam and Sheith until the people of Adam and Sheith say: "By
Allah this is truly the scripture of Adam and Sheith, it showed to us
what we didn't know in it and what was left hidden from us and what
was removed from it or changed from it", then he recites the
scriptures of Noah and Ibrahim and Turah and Injeel and Zabur until
the people of Turah and Injeel and Zabur say: "By Allah these are
truly the scriptures of Noah and Ibrahim and nothing has been removed
from it or changed from it, by Allah this Turah is complete, the Zabur
is complete, the Injeel is complete, and these contain more than we
have read from them before, then he recites Qur'aan and the Muslims
say: "Truly it is Qur'aan as revealed by Allah to Muhammad --peace be
upon him and his household-- and nothing has been removed or changed
from it" ...
So you see if there is no religion other than Islam your question would loose its validity, there would be no rule other than rules of Islam on the desk for anyone to judge based on it!
