because many of them are ordinary stiffs like you BUT I don't think that's the point of this thread.
"Show me just what Mohammed brought that was new, and there you will find things only evil and inhuman, such as his command to spread by the sword the faith he preached." - Manuel II Palelologus
One is not born Muslim, one chooses to be a Muslim. If someone chooses to join the KKK, one is a bigot. If one chooses to join the ranks of Islam, one is a death cultist. Not an ordinary stiff. Ordinary stiffs do not join religions bases on world conquest, torture and murder.
I guess I just have a hard time trusting people who's highest religous ideal is to be a mass murderer.