What's the Sunni take on/perspective on incident of Hazrat Umar and bibi Fatima when he charged her during her pregnancy?
Sunnis consider the "incident" to be fabricated with the intention to slander Abu Bakr and Umar.
In Shia books which claim this incident, it is not recorded with a sound chain of narrators, so Sunnis do not accept it.
The oldest reference to this incident is the Shia book called Al-Saqifa (السقيفة) or Kitab Sulaym bin Qais ( كتاب سليم بن قيس ) which is a collection of narrations attributed to Sulaym bin Qays (سليم بن قيس الهلالي) and collected by Aban ibn abi-Ayyash (أبان بن أبي عياش فيروز) who is weak (ضعيف) and his book is fabricated (موضوع) according to Sunnis and also several Shia works on Ilm al Rijal such كتاب الرجال of ابن داوود الحلي :
٢ ـ أبان بن أبي عياش ، بالياء المثناة تحت والشين المعجمة فيروزين ( جخ غض ) ضعيف ، قيل إنه وضع كتاب سليم بن قيس
٢٢٦ ـ سليم بن قيس الهلالي ى ، ن ، سين ، ين ( جخ ) ينسب إليه الكتاب المشهور وهو موضوع بدليل أنه قال : إن محمد بن أبي بكر وعظ أباه عند موته. وقال فيه : إن الائمة ثلاثة عشر مع زيد. وأسانيده مختلفة ( غض ) : لم يرو عنه إلا أبان بن أبي عياش وفي الكتاب مناكير مشتهرة ، وما أظنه إلا موضوعا
Sunnis believe that this is a lie spun to degrade the Ahle Bait and to malign the Sahaba.
Ali, the Lion of Allah, whose bravery and strength is unmatched, would never have let such a thing happen on his watch. And if it had happened, Ali would never have pledged allegiance to Abu Bakr and Umar, and he would have taken swift revenge from them.
Instead Ali gave allegiance to both, and he said the following about Umar on his deathbed:
Narrated Ibn Abbas:
When (the dead body of) Umar was put on his deathbed, the people gathered around him and invoked (Allah) and prayed for him before the body was taken away, and I was amongst them. Suddenly I felt somebody taking hold of my shoulder and found out that he was Ali bin Abi Talib.
Ali invoked Allah's Mercy for Umar and said, "O Umar! You have not left behind you a person whose deeds I like to imitate and meet Allah with more than I like your deeds. By Allah! I always thought that Allah would keep you with your two companions, for very often I used to hear the Prophet (ﷺ) saying, 'I, Abu Bakr and Umar went (somewhere); I, Abu Bakr and Umar entered (somewhere); and I, Abu Bakr and Umar went out."'
Oppression of the only survivor of the Messenger of God (PBUH), Hazrat Zahra (PBUH) and the martyrdom of that one lady, is an undeniable truth and one of the indisputable facts of Islamic history. In a way that no one can deny and reject it, because historians and narrators in general and in particular, despite the pressures and restrictions that have always been on them throughout history, still deal with it in different forms and different expressions. They are so that every researcher and without prejudice will find it by referring to the reliable sources and first-hand sources of Muslims, including Shiites and Sunnis.
In this brief, we want to prevent any exclusion and rejection of these bitter historical events, and any suspicion among the youth, by bringing some examples of the statements of Sunni scholars and elders.
Abu Muhammad Abdullah Ibn Muslim Ibn Qutayb Dinuri (known as Ibn Qutaybah) who died in the year 276 AH, in his book called Imam's Politics, Volume 1, Page 12, Third Edition, 2 volumes in one volume, entitled How was the pledge of allegiance to Ali Abi Talib, may God honor him? (how Ali Karamullah Vajah pledged allegiance) narrated the document from Abdullah bin Abdul Rahman Ansari, quoting the document, who said: One day, Abu Bakr found out from those who disobeyed his allegiance and gathered with Ali. So he sent Umar after them - who had gathered in Ali's house - so they refused to leave the house, at this time Umar ordered you to bring firewood and addressed the family: "I swear by the one who "Omar's life is in his hands. You must leave, otherwise I will set the house on fire with his family." Someone said to Omar: O Abba Hafiz, do you know that Fatima is in this house?! Omar said: Even though Fatima is at home!
In the same book, Volume 1, Page 13, mentioning the document, he says: ... After a while, Umar said to Abu Bakr, "Let us go to Fatima, because we have angered her." So they went to Fatima together and they allowed her to enter, but Fatima did not allow them to enter, so they had to come to Ali and talk to him, until he brought them to Fatima. So as soon as they sat down with Fatima, Fatima turned her face to the wall. At this time, the two greeted Fatima, but she did not answer their greeting, so Abu Bakr began to speak and said: O Habiba, the Messenger of God, did we anger you about the inheritance of the Prophet and also about your husband? Fatima said: What can happen to you, that your family inherits from you, but we do not inherit from Muhammad! Then Fatima said: If I remind you of a hadith of the Prophet, will you accept it, and will you believe in it? Omar and Abu Bakr said: Yes. So Fatima said: I swear by God, did you not hear the Prophet say: "Fatima's satisfaction is my satisfaction and Fatima's anger is my anger. "So whoever loves my daughter Fatima has loved me, and whoever satisfies Fatima has satisfied me, and whoever angers Fatima has indeed angered me." Omar and Abu Bakr said: Yes, we heard from the Prophet. Fatima said: So I, God and the angels, bear witness that you two made me angry and you did not satisfy me, and whenever I meet the Prophet, two of you will complain to him. At this time, Abu Bakr began to cry while Fatima said: swear to God, I (Abu Bakr) will curse you in every prayer I offer.
Ibn Shahr Ashob Sarvi (died in 588 AH) in his book Al-Manaqib, Volume 3, Page 132 of Ibn Qutaybah Dinuri's book of encyclopedias, quotes the children of Fatima (PBUH) as follows; Fatemeh's children are: Hassan, Hussein, Zainab, Umm Kulthoum and Mohsen, who was killed by a hit of enemy. It should be noted that in today's editions of Ibn Qutaybah's book of encyclopedias it is stated as follows: So Ali had several children named Hassan, Hussein, Umm Kulthum and Zainab Kobra, whose mother was Fatima, the daughter of the Messenger of God (PBUH), but Mohsen Ibn Ali died as a child!