But it will help muslims feel better about themselves.
An imam issued a fatwa against spaceflight and - IIRC - against colonizing other heavenly bodies. I think this happened last year.
This could have something to do with why NASA doesn't really have a serious plan for going to Mars.
BTW, it's hard to kneel toward Mecca when you're on another planet. Even harder when you're weightless, I should imagine.