SAE was obviously crazily racist but by no means is the entire greek system at the school crazy. In fact, OU’s dry campus policy makes frat parties less wild than at other schools. I also assure you that if I thought for a moment that my sorority practiced or encouraged any sort of non gender based discrimination (it is a single sex organization after all) I would immediately quit.
Students at the University of Arkansas are also not all bleak and reserved. It is a school of 26,000 students. Presumably at least a few crack a smile or occasionally talk to others.