The great Hanafi jurist, Imam Ibn Abidin (Allah have mercy on him) states:
“There is no doubt in the disbelief (kufr) of those that falsely accuse Sayyida Ai’isha (Allah be pleased with her) of adultery, deny the Companionship of Sayyiduna Abu Bakr ( Allah be pleased with him), believe that sayyiduna Ali (Allah be pleased with him) was God or that the angel Jibril by mistake descended with the revelation (wahi) on the Messenger of Allah (Allah bless him & give peace), etc… which is apparent Kufr and contrary to the teachings of the Qur’an.” (Radd al-Muhtar, 4/453)
Therefore, Shi’as who hold such beliefs are without doubt out of the fold of Islam.
Those who do not hold beliefs that constitute Kufr, such as believing that Sayyiduna Ali (Allah be pleased with him) was the rightful first Caliph after the demise of the Messenger of Allah, belief in the twelve Imams, etc…
Such Shi’as cannot be termed as out of the fold of Islam, rather they are considered to be severely deviated and transgressors (fisq).
Imam Ibn Abidin states:
“It is difficult to make a general statement and judge all the Shi’as to be non-believers, for the scholars have agreed on the deviation and defection of the deviated sects.” (ibid)
It should be remarked here that some members of the Shi’a community display outwardly not to have believes that constitute Kufr, but keep these beliefs in their heart, which they call Taqiyya.