Some fundamentalists see the reverence for saints, which is common in Shiite Islam, as a form of idolatry, because in their view it shows devotion to something other than the worship of a singular God. read more
Fundamentalist Muslims like the Salafy or the Wahabi will not stand for these non-traditional practices, and believe them to be abhorrent. There is a strict system for determining what is correct behavior in Islam, and the "improvisations" of Sufis are seen as outside the norm. read more