A very simplistic interpretation of Islamic history where examples like yours are cited as a matter of course. What would hz Ali’s failure to pay allegiance to hz Abu Bakr for six months mean? Could it be that ‘some’ did not want to see Prophethood and caliphate combined in Banu Hashim on pre-Islamnic clan rivalries? it wasnt taqiyya! hz Ali and his devout followers made no secret about his claim for caliphate right from the start. Furthermore, the events of Saqifa werent as peaceful and harmonious as some would like to believe. Do read about the selection of hz Umar and the subsequent selection of hz Usman. It isnt as delightful as our Islamic books teach us to be.