They did this without consulting the Household of the Prophet...
They did this without consulting the Household of the Prophet, his relatives or many of his friends, who were busy with the funeral, and without providing them with the least information. Thus Ali and his companions were presented with a fait accompli. Ali and his friends - such as 'Abbas, Zubayr, Salman, Abu Dharr, Miqdad and 'Ammar - after finishing with the burial of the body of the Prophet became aware of the proceedings by which the caliph had been selected.
They protested against the act of choosing the caliph by consultation or election, and also against those who were responsible for carrying it out. They even presented their own proofs and arguments, but the answer they received was that the welfare of the Muslims was at stake and the solution lay in what had been done.
It was this protest and criticism which separated from the majority the minority that were following Ali and made his followers known to society as the "partisans" or "shi'ah" of Ali. The caliphate of the time was anxious to guard against this appellation being given to the Shi'ite minority and thus to have Muslim society divided into sections comprised of a majority and a minority.
The supporters of the caliph considered the caliphate to be a matter of the consensus of the community (ijma') and called those who objected the "opponents of allegiance." They claimed that the Shi'ah stood, therefore, opposed to Muslim society. Sometimes the Shi'ah were given other pejorative and degrading names. Shi'ism was condemned from the first moment because of the political situation of the time and thus it could not accomplish anything through mere political protest.
Ali, in order to safeguard the well-being of Islam and of the Muslims, and also because of lack of sufficient political and military power, did not endeavor to begin an uprising against the existing political order, which would have been of a bloody nature. Yet those who protested against the established caliphate refused to surrender to the majority in certain questions of faith and continued to hold that the succession to the Prophet and religious authority belonged by right to Ali.
They believed that all spiritual and religious matters should be referred to him and invited people to become his followers.