There is nothing herw about attacking the house. Its just added by the 12ers themselves.
There is definitely compelling evidence a threat was made, particularly in the Saheeh narration of Aslam, the slave of Umar b. al-Khattab, in Musnad al-Bazzar, whereby the second Caliph threatens to burn the house down, something corroborated in many, many other chains of narrations from people all over the peninsula and beyond through independent routes.
Furthermore, according to Saheeh narrations in al-Bukhari, the context is further corroborated, in Ali and others gathering in the house of Ali and Fatima and opposing the first Caliph.
However, my opinion , and the opinion of some, including As-Shaykh Sayed Fadllulah, a major scholar of his time and still widely followed, is that we have evidence a threat is made, but what happened after we don't know. It is not part of Shia Aqeedah, it may have happened, but there is a lot to doubt about what took place due to conflicting reports and question marks over the actual event.
It is possible this was highly polemicised and distorted through history.
However, to threaten to force Ali out unless he gave his Bayah, and to burn down a house which not only contains Sahaba , but Ali, Fatima, Hasan and Hussain is without a doubt a threat i am sure even you will accept is to be condemned.
However, given we have evidence of the second Caliph behaving in a similar manner throughout his life, something Ahlus-Sunnah Wal Jamaah will accept, i don't think it's unlikely, as a number of Sunni Ulema have mentioned, for some force to have been used to try and get Ali out to give his Bayah.
The idea however, that he was whipping Fatima, or that he tried to burn the door on her, or hit her while Ali and the Ummah watched, is something i consider highly questionable and not corroborated by any reliable sources.