Just from what's in the another post I read, I'd say that they were not "merely" racist, but threatening. I mean, that is the South, home to the KKK that murdered a hell of a lot for the "crime" of being black. That makes them dangerous.
And, of course, it's the kind of crap I'd expect from the majority of Greeks - classiism, racism, you-have-to-be-worth-money-to-get-in.... They've never had much of a rep beyond party, drinking, etc, and this goes back to my first time in college, long before most of you were born.
I see no reason to make Greeks part of the official college landscape. Most of 'em have nothing to do with actual learning... which is, allegedly, what you're paying that money for.
mark