The fact that it's religiously-related is irrelevant.
What if my religion believes that women should be 100% subservient to men? Does that mean that as a store salesperson that I get to tell female customers what to purchase?
What if I want to carry one of these religious knives?
Or maybe I like dressing like this:
A expectation of dress is exactly that. Freedom of religion means freedom to practice your own, but should equally mean that others shouldn't have to pay you for practicing yours.