Question 539: One of the beliefs of al-Zaydiyyah is that the caliphate was for `Alee ibn Aboo Taalib (may Allah be pleased with him), but the Companions wronged him and usurped his right to the caliphate, and that the Messenger (peace be upon him) willed the caliphate for him after his death.
Answer: After the death of the Prophet (peace be upon him), the caliphate was the right of Aboo Bakr then `Umar then `Uthmaan then `Alee (may Allaah be pleased with them all) according to a general consensus of Muslim scholars. Whoever opposes the caliphate of any one of them goes against the beliefs of Ahl-ul-Sunnah wal-Jamaa`ah (adherents to the Sunnah and the Muslim mainstream) from the Companions (may Allaah be pleased with them), and their followers with good conduct… read more here.
Question 448: When did Shee`ah (Shi’ites) and Qadianiyyah beliefs appear?
Answer: Supporting Ahl-ul-Bayt (members of the Prophet’s extended Muslim family) began during the Caliphate of `Alee (may Allaah be pleased with him). He denounced them for this, and burned a group of them who claimed him to be an Ilaah (God). As for the Qaadianiyyah, they appeared at the end of the thirteenth century... read more here.
Question 26: Is it permissible for us to study the religious books that are published by Daar al-Tawheed in the Republic of Iran?
Answer: We advise you not to read the religious books published in Iran, as they include Bid‘ah (innovation in religion), Shirk (associating others with Allaah in His Divinity or worship), and curse the Sahaabah (Companions of the Prophet)… read more here.