Why do shias consider imamate(12 infallable imams)an ARTICLE of FAITH when its NOT even mentioned in theQURAN?

Its amazing how they can deny their kufr

And when his Lord tried Ibrahim with certain words, he fulfilled them. He said: Surely I will make you an Imam of men. Ibrahim said: And of my offspring? My covenant does not include the unjust, said He. Quran [2:124] If you think the Imamat of Ibrahim(as) is the same is the Nabuwat of Ibrahim(as) then my friend you are misguided. Muhammad is not the father of any of your men, but he is the Messenger of Allah and the Last of the prophets; and Allah is cognizant of all things. Quran [33:40] The above verse concludes the termination of the office of prophethood after demise of Prophet Muhammad (SAW). Can you show me any verse or hadith from history which points towards the termination of the office of Imamat? According to the Holy Quran...Prophet Daud(as) and Prophet Soliman(as) are said to have great kindgom...Now which kingdom is this verse talking about that was givenn to the children of Ibrahim? Is this a materialistic kingdom like the kingdom of Daud(as) and Suleman(as) or a Spiritual Kingdom of Imamat? Or do they envy the people for what Allah has given them of His grace? But indeed We have given to Ibrahim's children the Book and the wisdom, and We have given them a grand kingdom. Quran [4:54]

i only read the title of your question and not the rest........ clearly you, and whoever has thought you about these teachings, did not have enough knowledge about Islam nor the Shia school of thought....... because Pillars of Islam (or as the Shia school says, "Usul al Deen" meaning the "root of religion") in the Shia school it's 3: 1. Tawheed (beliving Allah SWT) 2. Nabawat (The Prophethood) 3. Mi'ad (day of judgment) these 3, plus the other two (Imamat and Adl) are "Usul al Deen and Madhab" this means, in order to classify someone as a "Muslim", they need to believe in the first 3, and in order for someone to be classified as a Muslim Shia, they must belive the other 2 as well......... as for Imamat in the Holy Quran, it is in fact through out the Holy Quran, in many Verses such as 5:3, 5:55, 5:67 and many many more intrestinly, 9:40 is the Holy Verse of Cave, and Ahl Sunna Scholars have claimed whoever does not consider abu bakr as a "companion" he is a kaffir because he is rejecting the Holy Quran so where in the Holy Quran is the name of abu bakr mentioned? having said all this, even if the Holy Quran has opnely mentioned the name of Imam Ali (as), would you had accepted? the Holy Quran clearly talks about Muta in 4:24, yet you call Muta "prostitution" (NauzbiAllah)

Why is it you guys swtich from being Salafis to Koranists when "debating" with Shias? Dont you guys say Islam = Quran and Sunnah? Imamate is not only in Quran, but its flooded in the Sunnah And where does it say I have to follow Bukhari and Co in the Quran? Perhaps you can go find your local pub, no?

I'm guessing you're Sunni. I don't mean this in a offensive way. But, does it say for Sunnis to believe in the 3 Imams in the Qur'an? No, right? So, likewise, Shi'attes believe in their 12 Imams. They think that they can not be wrong, and that they were rightfully guided.