I would not argue it one way of the other, but I believe that I did see it and I skimmed over it. It did not stick in my mind, but I do believe that they could refuse service to someone because of their religious beliefs. Unlike Christians that can’t.
http://www.foxnews.com/us/2014/04/18/muslim-drivers-at-cleveland-airport-refuse-to-drive-cabs-with-gay-games.html