Wut?
I didn't realized there were any hostility to women and/or black people.
For women, I don't see it. I have tons of female friends that are programmers.
As for black people... two of my friends are black, one of them is female. And they've never complain about racism in their work force. I've worked with one black person and that person played the victim card a lot, that's another story in itself entirely, but other than that.
I haven't see any hostility against women or black people.
edit:
What I do see is the gender imbalance in CS major in education. Also there are far less black people in education but I'm not sure what's the driving factor is. It could be population wise, economic reason, etc...