According to all Shia Ulama...
According to all Shia Ulama, any person who has this belief or similar views about Imams is a Mushrik. Islam considers all such religions as polytheistic and believes in the absolute oneness of God. Quran has rigorously condemned all these religions and tells that the followers of these religions will be severely punished. Thus, all religions, except Islam, are polytheistic religions. Islam is the only religion which strongly believes in pure monotheism (i.e., absolute oneness of God).
Associating God with someone. Another kind of Major Shirk is : G to associate Allah with someone as par t of Him, G to consider anyone like Him, G to give Allah's attributes to anyone else, G to include anyone in the worship of Allah. Imam Jafer Sadiq (as) has said; "If someone performs an action for Allah, and includes in it the pleasure of a human being, then the doer of that action is a Polytheist".
All Shia Ulama agree, as stated by an eminent Shia scholar of Iran, Sultan'l-Wa'izin Shirazi, who is well-known for his monumental book, The Right Path, also published in English with a title, Peshawar Nights, that offering in the name of other than Allah, or to include anyone in the offerings being made in the name of Allah, is not allowed in Mazhab -e- Ahlal- Bayit.
He further writes in the same book at page number 40 that; "If we make an offering not in the name of Allah, but for someone else, whether he be dead or alive, or if we include him with the name of Allah, even if he is an Imam or his son, the offering is not valid If this is done knowingly then it is evident polytheism as is clear from the verse "and not join anyone in the service of your Lord" (18:110) He further adds, "All Shia Jurists agree that to make an offering in the name of any person, including Prophets or Imams, is wrong.
If it is done intentionally, it is polytheism. An offering must be made in the name of Allah. Although, we are allowed to do it wherever and whenever we like. For instance, if someone takes a goat to a particular place of worship or to the tomb of an Imam and sacrifices it in the name of Allah alone, there is no harm in it. But if pledges to make an offering in the name of the Prophet or an Imam, or some other person, it is forbidden." Portraying anyone like God.
The third kind of Shirk is to por tray anyone as God. This type of Shrik is the outgrowth of inferiority complex and scantiness.