This I haven't heard before you. I agree that most likely pot smokers are no less obnoxious than the general population, although I have no data to back it up. But what's this about islamics using pot? Where'd you get that?
BTW, it's not a theory, and yes Islamics have used pot down through the centuries for various evil purposes, e.g. getting so toked up they'd kill their own mothers, maybe you, certainly your dog.
Wow, man, you study that Islamic history and they'll tell you all about what pot does to totally destroy a civilization. Sure it takes a bit of time but look at the Middle East today.
Do you want to leave that as your legacy for your grandchildren?