Ayatullah:

Imam al-Sadiq would have made Takfir on the ‘Ayatullahs’ and the absolute majority of the Shi’ites who are indulged in such paganism in the name of Islam and the Prophet’s Household (peace be upon them):

The actual position of the Ahl al-Bayt from Shia sources whom Shias are either ignorant of or chose not to follow (due to them agreeing with the monotheistic nature of Sunnism i.e. Islam):

عن عباس بن يزيد عن ابي عبدالله عليه السلام قال: قلت له: ان هؤلاء العوام يزعمون ان الشرك اخفى من دبيب النمل في الليلة الظلماء.. فقال: لا يكون العبد مشركا حتى يصلي لغير الله أو يذبح لغير الله أو يدعو لغير الله عز وجل..»

وسائل الشيعة 341/28
وبحار الانوار 96/69
والخصال 136/1.

On the authority of Abbas Ibn Yazid [nice name for a Shia, isn’t it?], from Abi Abdillah (al-Sadiq), peace be upon him, whom I [Ibn Yazid] told: The people claim that shirk is more hidden than the creeping of an ant in the pitch-darkness of the night. He (Al-Sadiq) said: “The slave (of Allah) does not become a Mushrik until he prays to other than Allah, sacrifices for other than Allah or invokes other than Allah ‘azza wa jall”.

Source:

Wasa’el Al-Shia 341/28
Bihar Al-Anwar 96/69
Al-Khisal 136/1.

All the prohibitions are done by Imamite Shi’ites and sanctified by their Grand Ayatullahs. From praying (or invoking) the Ahl al-Bayt (under the pretext of Tawassul) to sacrificing for Imams, [Abu al-Fadhl] al- ‘Abbas etc.