It started as Mohammed's sex cult, and in the absence of Mohammed evolved into a death cult. All sex cults that survive the death of their founder must evolve, but most simply turn into somebody else's sex cult (Mormons) or a financial scam (Scientology).
Note that none of those lists include the two hundred plus million estimated to have been murdered by the various Muslim invasions of Hindu India.
Islam has a stack of bodies to its name that is matched by no one, anywhere, at any point in time.
It started as Mohammed's sex cult, and in the absence of Mohammed evolved into a death cult. All sex cults that survive the death of their founder must evolve, but most simply turn into somebody else's sex cult (Mormons) or a financial scam (Scientology).