Sorry for such a long question description, but it became long due to several citations. In short, Why there is misconception of considering Hinduism as “polytheistic religion and why it is still being considered? Anything stated in Islamic philosophy?
I would like to state some of the facts I have found:
Myths that most of them believe in Hinduism by others, that there are 330 million Hindu gods, hence calling it as “polytheism” which is totally wrong. Read the myth number 1 & even 2 from this source
In short, there are similarities between Hinduism and Islam which you can refer from here on Wikipedia and here on Quora which states “The authentic scriptures of both religions teaches monotheism”.
It’s not yet cleared till now that Hinduism is a polytheistic religion read from here. Instead there are proofs that Hinduism is a monotheistic religion according to the sacred books which can be referred from here
I’m trying to get this answer because in a previous answer to my question where it was said that according to Quran 2:221 says that the Qur'an directly forbids marriage to a polytheist.
Even in addition, some countries like Tunisia and especially India according to Special Marriage Act, 1954 allows inter-religion marriages according to the abiding laws. Then why not it is acceptable in the religion itself?
Even here it was asked that Does the Qur'an prohibit Muslim women from marrying non-Muslim men or just Jews and Christians? says that “The majority of scholars say that Muslim men are allowed to marry Christian and Jews” according to the People of the Book. Additionally stated that “In later Islamic usage, the use of the term was later extended to even polytheistic Indians".
Also, it was said “The final point which many will argue against is a Muslim woman marrying Christian/Jew. Sadly there is no proof from Quran and Sunnah to back that up, but still many scholars would say it is not allowed.”
But, in another thread asking Why are Muslim women prohibited from marrying non-Muslims while Muslim men are allowed to? it says it is prohibited according to Quran 60:10 due to disbelievers but it’s nowhere stated that Hindus are disbelievers.
At last, in Book 46, Hadith 37 says
No baby is born but upon Fitra. It is his parents who make him a Jew or a Christian or a Polytheist.