It was not the sufficiency of Abu Obayda that led Omar to wish so, because he thought that Ali was the most sufficient one for the caliphate; nevertheless he did not want to undertake the responsibility of the umma alive or dead. [2]
Hakika Dr.Barnado Luise alilizingatia Suala la kuwepo Abdallah bin Sabai kuwa ni suala au picha iliyo simama kwenye msingi wa khayali na dhana, na akasisitiza kuwa mambo aliyo husishwa nayo ni mambo yaliyo undwa na watu walio kuja mwishoni.[69]