Halloween Costumes Banned

I don't think that what the guy wore as a costume was bad. I mean it is Halloween after all your supposed to dress up as something and the guy just happen to want to dress up as a Nazi. The only thing I would worry about is where he got the outfit in the first place. Because dressing up isn't bad it would be bad if he was trying to kill someone. Other than that his costume shouldn't have been the cause of banning costume day at the school.