I've lived a good chunk of my life in apartment complexes, and I met a lot of Muslim families in those places. For the most part, they were great people. Just lovely, friendly, people, no different than anyone else.
I have met some shady Muslims, of course. But I've met shady Catholics and Jews, too.
Personally, I find the born-again Christian to be the worst kind of person. They always seem, in my experience, anyway, to be very self-righteous and judgmental.
Anyway, SAM, I don't think anyone thinks the average Muslim is any different than anyone of any other faith. People have a problem with Muslim fringe groups more than anything.