For the profession in which I work (architecture/engineering), in 99% of the cases being Muslim or Christian or Hindu or whatever is not an issue that has much bearing. I have found engineers from certain countries to behave in broadly stereotypical ways, mostly unrelated to their religious status. But only broadly, and there are always exceptions. Stereotypes, of course, cut both ways.
On actual construction sites, where you tend to meet a large number of lesser-educated laborers in addition to the professionals, I see more bigotry and misunderstanding. But even among the roughest types I've ever been among, I have never seen any actual confrontation of any type.
I used to work in a large company whose local office, for whatever reason, had a large number of conservative Christians in addition to Hindi and Muslims. There was zero animosity on a religious basis, though some of the Christians were politely but enthusiastically evangelical. In fact, one of the more overtly Christian engineers lobbied to be assigned to a position in Afghanistan for a year just so he could preach the Gospel to the heathens in his spare time.
I have to say, in my day-to-day adult life, I encounter very little actual friction from Muslims here, and somewhat more from conservative Christians (though that is directed much more at perceived atheistic immorality rather than towards believers who happen to worship a different god).