Was he intoxicated by any chance?...some people really do have that much of a chip on their shoulder they look for any reason to be kind of a jerk, but drunk people can also get pretty illogical especially if they happen to get angry while intoxicated.

Either way it was certainly more about them than anything you did, so hopefully you don't feel bad about the incident...like you should have done anything different. But that is ridiculous...I mean I can see people grudgingly pulling it out thinking they look old enough so they shouldn't have to, but not usually going off like that about it.