This means that the election would lose its own nature and...
This means that the election would lose its own nature and it would be a dictatorial operation. It is well known that the Prophet said: "There is no validity for any allegiance given by force." Now let us see what Umar did on those days.
Sunni historians reported that: When Umar came to the door of the house of Fatimah, he said: "By Allah, I shall burn down (the house) over you unless you come out and give the oath of allegiance (to Abu Bakr)." Sunni References: History of Tabari (Arabic), v1, pp 1118-1120 History of Ibn Athir, v2, p325 al-Isti'ab, by Ibn Abd al-Barr, v3, p975 Tarikh al-Kulafa, by Ibn Qutaybah, v1, p20 al-Imamah wal-Siyasah, by Ibn Qutaybah, v1, pp 19-20 Also: Umar Ibn al-Khattab came to the house of Ali.
Talha and Zubair and some of the immigrants were also in the house. Umar cried out: "By God, either you come out to render the oath of allegiance, or I will set the house on fire." al-Zubair came out with his sword drawn.
As he stumbled (upon something), the sword fell from his hand so they jumped over him and seized him." Sunni Reference: History of Tabari, English version, v9, pp 186-187 In the footnotes of the same page (p187) in the English version of the History of al-Tabari the translator has commented: Although the timing is not clear, it seems that Ali and his group came to know about Saqifa after what had happened there. At this point, his supporters gathered in Fatimah's house.
Abu Bakr and Umar, fully aware of Ali's claims and fearing a serious threat from his supporters, summoned him to the mosque to swear the oath of allegiance. Ali refused, and so the house was surrounded by an armed band led by Abu Bakr and Umar, who threatened to set it on fire if Ali and his supporters refused to come out and swear allegiance to Abu Bakr. The scene grew violent and Fatimah was furious.
(See Ansab Ashraf, by al-Baladhuri in his , v1, pp 582-586; Tarikh Ya'qubi, v2, p116; al-Imamah wal-Siyasah, by Ibn Qutaybah, v1, pp 19-20). Abu Bakr said on the authority of an authentic report that, after the demise of the holy Prophet when the people had paid fealty to him, Ali and Zubair used to go to Fatimah al-Zahra, daughter of the Prophet, for consultation. When this fact was known to Umar, he went to Fatimah and said: "O' daughter of the Prophet!
I didn't love anyone as much as I loved your father, nor anyone after him is more loving to me as you are.