They do have some. My Russian wife has an ethnic Kazakh friend who is stunningly beautiful. She's also a Muslim who likes to go clubbing in micro-miniskirts and can knock back booze with the best of 'em.
Go figure.
The actress who plays Lilly in the AT&T commercials is from Central Asia.
Seriously though, I had a Russian maid who, after I knew her for a couple of years told me she was muslim. I was truly shocked. If she didn't tell me there was no way of knowing. Totally normal person.