What Is Shiite Islam. They affirm that allah is the one true god and that muhammed is his prophet. Historically, sunni muslims believed that abu bakr was the rightful successor, while shiite, or shia, muslims thought it should have been ali ibn abi talib.

It is also the state religion of iran. Outside of iran, iraq, lebanon, and azerbaijan, shia is a lopsided minority among muslims. How can we know for sure?