You do know that their religion holds the record for number of people murdered, right? 100 million people have been killed by the followers of Islam. The Hindu Kush mountain range is named after a massive massacre of Hindus by Muslims. "Hindu Kush" means "Hindu Slaughter."
The Islamists have managed to beat even the Communists in mass death, and that is no small accomplishment.
I read on FR awhile ago where Mohammed was part of a tribe that was expanding territory in battles. And they had a hard time keeping all of the various tribes that they captured under control. So he came up with the muslim “religion” in order to unite the various tribes under one thought system.
To be fair, Islam has been around a lot longer than communism.
Has something of a head start so to speak...