That's why I got out of the retail world! People would be terribly rude for no good reason! Why can't you just be polite to people!!!
I have seen many a Christian with a 'holier-than-thou' attitude. I wish the rest realized that that's a lot of the reason Christians are starting to get a bad rap. There are a lot that are the nicest, kindest people you'll ever meet. Unfortunately they are overshadowed by the entitled, rude brats that think they can do whatever they want.
EDIT: Welcome, Knittens! Pull up a cushion!