Years ago, I had a camera store in a small midwestern college town, and for some odd reason I seemed to attract most of the middle eastern trade, of which there was a fairly large amount thanks to the college being some kind of magnet for it. I never figured out why the college attracted so many folks from that part of the world, but I more or less concluded that my store's "hole in the wall" ambience made it the closest thing in town to a stall in the bazaar. (seriously)
I do know (because they told me) that a lot of the used equipment I sold ended up being re-sold "back home" because it would bring a premium in that part of the world.
Anyway, some of my customers were Iranian, and when the revolution/hostage situation happened, they all got called back (and I think the US ), and they were not happy about it. One guy came in to buy a tripod to take back, and broke down crying when he found out, and told me that the revolutionaries had killed his brother because they were Kurds, and not "religious". He was a complete wreck, and I ended up giving him the tripod and a bunch of other stuff he could sell on the black market when he got home to maybe help his family survive a bit longer. I have no idea if he or any of the others survived.
Anyway, you can add "Kurds" to your list of non-moslem parts of Iranian society.