structural:scholar_edition, information:extraction
Use of violence

Umar has been noted for his severity and misogyny, especially in Shia sources. "Umar's toughness" (shidda) is cited in a Sunni tradition by Aisha as the reason Umar was excluded from a supposed attempt at reconciliation between Ali and Abu Bakr. Kelen describes an incident of Umar's violence against his sister when she professed Islam (before Umar). It is uncertain what followed the above altercation at Fatima's house. Shia sources allege that Fatima suffered injuries and miscarriage during a raid on her house led by Umar. In particular, Shia alleges that Fatima miscarried her son Muhsin, whose name had been chosen by Muhammad before his death, according to Abbas. These claims are categorically rejected by Sunnis, who maintain that Muhsin died in infancy of natural causes.

The allegations of violence and miscarriage appear in some Shia works, including the canonical Kitab al-Kafi, Kamil al-ziyarat, Kitab al-Irshad, Tarikh al-Ya'qubi, and Dala'il al-imama. Of these, Tarikh al-Ya'qubi does not mention miscarriage, while Kitab al-irshad by al-Mufid (d. 1022) is quiet about any violence. For the latter, considering that al-Mufid writes about violence against Fatima elsewhere, Khetia suspects that he refrained from controversial topics in his Kitab al-Irshad to render it accessible to most Twelvers without provoking the anger of Sunnis. In his al-Saqifa wa Fadak, al-Jawhari (d. 935) includes a tradition to the effect that Umar and his men first threatened to set Fatima's house on fire. Then they entered the house, despite her pleas, and forced Ali and his supporters out of the house. The remainder of the account in al-Imama wa al-siyasa describes that Ali was pulled out of his house by force and threatened with death, according to Khetia. Mu'awiya (r. 661–680) is known to have alluded to the violent arrest of Ali in a letter to him before the Battle of Siffin.

Madelung is uncertain about the use of force. Still, he notes that there is evidence (in Sunni sources) that Fatima's house was searched. According to Madelung, Ali later repeatedly said that he would have resisted (Abu Bakr) had there been forty men with him. Alternatively, Buehler suggests that the allegations of violence should be treated with caution as they reflect the political agendas of the time. In contrast, Veccia Vaglieri is of the view that the Shia allegations are based on facts, even if they have been exaggerated. Abbas writes that some well-regarded Sunni sources mention Umar's raid and Fatima's injuries. Khetia believes that there are known instances where sensitive information has been censored by Sunni authors, such as the prominent jurist Abu Ubayd al-Salam (d. 837), who was possibly concerned with the righteous representation of Muhammad's companions. Similar allegations have emerged against al-Tabari and al-Mas'udi (d. 956). Along these lines, Lucas and Soufi both note the Sunni tendency to minimize and neutralize the conflicts among companions after Muhammad, particularly about the Saqifa affair, while these conflicts might have been amplified in Shia records.

Both al-Tabari and al-Mas'udi note that Abu Bakr regretted the events after Saqifa on his deathbed. In particular, al-Tabari states that Abu Bakr wished he had "never opened Fatima's house to anything, even though they had locked it as a gesture of defiance." This appears to have been a sensitive admission that has been censored by the Sunni author Abu Ubayd al-Salam in his Kitab al-amwal. Abu Bakr's regret is also cited by the Shia al-Ya'qubi (d. 897-8). Sunni sources are nearly unanimous that Ali pledged his allegiance to Abu Bakr after Fatima's death. When it became clear that Muslims did not broadly support his cause, Ali is said to have relinquished his claims to the caliphate for the sake of the unity of a nascent Islam, which faced internal and external threats, according to Mavani. In particular, Jafri notes that Ali turned down proposals to forcefully pursue the caliphate, including an offer from Abu Sufyan. In reference to Abu Bakr's caliphate, Madelung writes that a poem later began to circulate among the Banu Hashim ending with, "Surely, we have been cheated in the most monstrous way." Ali forbade the poet to recite it, adding that the welfare of Islam was dearer to him than anything else.

In sharp contrast with Muhammad's lifetime, Ali is believed to have retired from public life during the caliphates of Abu Bakr, Umar, and Uthman. Anthony describes this change in Ali's attitude as a silent censure of the first three caliphs. While he reportedly advised Abu Bakr and Umar on government and religious matters, the mutual distrust and hostility of Ali with Abu Bakr and Umar is well-documented, though largely downplayed or ignored in Sunni sources. Their differences were epitomized during the proceedings of the electoral council in 644 when Ali refused to be bound by the precedence of the first two caliphs. A common Sunni argument is that Ali would have never continued his relations with Umar had the latter organized a raid on Ali's home. A typical Shia response is that Ali gave up his rights and exercised restraint for the sake of a nascent Islam, according to Abbas.