What stood out for me was I didn't notice a single woman out of the hundreds of people shown in this video. And with a few exceptions they were all white. I very much want to know the attitudes of all those white men toward women and non-whites.
the scene has definitely become more diverse. non-whites and females are more well represented in hardcore than they are in the software industry.
that all said, racism and sexism have basically always been unacceptable in the hardcore community, and blatant racist or sexist behavior at a show would, for better or worse, probably result in having the shit kicked out of you. not that i condone violence, but there are few places in the world where discrimination is so actively discouraged.
there are racist subdivisions and bands, but they are basically considered the Westboro Baptist Church of hardcore.