I personally dont think they're all muslims, but other ahlus sunnah scholars are of the opinion that their largest sects, ithna ashari and jafari are muslim: Those who do not hold beliefs that constitute Kufr such as believing that Sayyiduna Ali (Allah be pleased with him) was the rightful first Caliph after the demise of the Messenger of Allah, slander other Companions (sahaba) belief in the twelve Imams, etc� Such Shi�as can not be termed as out of the fold of Islam, rather they are considered to be severely deviated and transgressors (fisq). http://qa.sunnipath.com/issue_view.a...=1898&CATE=164 Notwithstanding the known disagreements between Sunnis and Shia, traditional Sunni scholarship has considered the Shia to be Muslim, and ultimately of the people of Heaven. And Allah alone gives success. Faraz Rabbani http://spa.qibla.com/issue_view.asp?...D=9787&CATE=24