That's true, but it's not a binary either. Dumbass college kids most often simply aren't going to have the same level of self-awareness (with regard to biases among other things) that many other people have. That's not an absolution, it just is what it is. It's still gross for them to cheer him, but maybe incrementally less so than say, one of their professors doing it or something.
Regardless, the whole production is really disappointing, and it's scenario we see way too much of.