That argument loses a bit of weight when he has cheated to win every match he's won since coming to Smackdown.
True, but they could do this angle without the cheating and he could be a very positive face role model and it'd be pretty neat. Faces cheat all the time, too, so the cheating aspect is pretty inconsequential these days.
Sami is of Syrian descent, LP. I don't believe it's ever been mentioned on screen outside of his tights and maybe one of his earliest promos in NXT. They've had him do pieces for Youtube when they do Middle East tours, though.