From this aspect...

From this aspect, we must count all the twelve Caliphs and not make exclusions like some sects of Ahlul Sunnat do by excluding Yazeed from the luminaries of twelve Caliphs. This is not an aimless discourse. Doubtlessly, no follower of the principles of Caliphate could exclude Yazeed from the twelve Caliphs. Thus, Shah Waliullah Muhaddith Dehlavi in his book, Izalatul Khifa mentions in serial order the names of the twelve Caliphs of Ahlul Sunnat and Yazeed is also included in the list.

Now, this was about the twelve Caliphs of Ahlul Sunnat. Let us see the list of the twelve Caliphs of the Imamiyah Sect. There is no difference among the twelver Shias regarding the twelve Caliphs.

The Caliphs of Shias are as follows: Imam Ali Ibn Abi Talib (a.s.), Imam Hasan (a.s.), Imam Husayn (a.s.), Imam Zainul Aabideen (a.s.), Imam Muhammad Baqir (a.s.), Imam Ja’far Sadiq (a.s.), Imam Moosa Kazim (a.s.), Imam Ali ar-Reza (a.s.), Imam Muhammad at-Taqi (a.s.), Imam Ali an-Naqi (a.s.), Imam Hasan Askari (a.s.) and Imam Muhammad al-Mahdi (a.j.) (Peace be upon them all).

It should be clear that Shias consider Caliphate to be a divine affair on the basis of Quran and the tradition of the two heavy things (Thaqalayn). They also all believe in the infallibility of the Caliphs. According to the Imamiyah sect, it is necessary for the Caliph to be infallible. The Imamiyah say that the Prophet was infallible, therefore his successors should also be infallible. The successor of an infallible cannot be a non-infallible.

Ahlul Sunnat people have contrary belief with regard to the matter of Caliphate and they do not consider it to be a divine affair. The writer has shown that the statement of “We have the book of Allah…” (Hasbona Kitabullah) had created an atmosphere, which was not conducive to make the affair of Caliphate a divine affair. Thus, they consider the Caliphate of Abu Bakr valid on the basis of a single consensus (Ijma).

And according to principles, they do not successfully present any Quranic or traditional proof to justify their stand. Some proofs of nomination, that are presented by some Ahlul Sunnat scholars do not conform to their own principles of Caliphate. Because, if the nominative proofs are considered correct, the Caliphate of the three Caliphs will become an affair from Allah, which is the very belief of the Imamiyah sect and which is vehemently opposed by Sunni sect.

We shall study these nominative proofs later.