Is excessive yelling and screaming at a sporting event,mind you,a reason to be called "ghetto" and "white trash"?

There's no excuse for any sort of name calling, only mindless people do it, but name calling doesn't physically hurt anyone and so only those without brains react physically back to it.

To answer your question though, no it was not an excuse sporting events are loud, name calling at any time unacceptable the best way to deal with it, is to ignore it.