I'll give you an example. Some of my friends made disparaging remarks about Muslims. I made it clear that was a generalisation and pointed out a (predominantly Australian) area with a lot of crime, "what about that? Is that any different?" I've slowly but surely educated good people to show more tolerance.
Having said that, I'll be the first to condemn inappropriate behaviour from a Muslim, Asian, white, feminist - I don't really care who. I don't have a PC bone in my body.
There are some great comments in this thread. The one I can least relate to is that we can't talk to people who listen to different music or watch different TV. Really? I was involved with an African woman, Asian, European, Australian. I have had mixed friends all my life. I never honed in on TV shows, but, I honed in on honesty, integrity, attitude (eg. I can't stomach arrogance, victim mentality and aggressive people). Is this so rare that people can converse beyond skin colour and gender?