I think some underestimate the number of blacks who truly dislike whites, and just how deep that dislike runs. Those numbers encompass far more than the typical thug living in the projects. Without going into great detail, I deal with a lot of blacks on a very regular basis. A vast majority of them are living a middle-class lifestyle or above. They are educated, and by all outward appearances, they are your average American citizen. When you truly take the time to talk to them and learn about how they honestly feel, you'd quickly realize just how angry they are with the white community.
Without living in black skin, it is difficult for most whites to get a firm grasp on what many blacks go through on a daily basis. There's no doubt some overreact and interpret certain situations as something they aren't, but having two mixed nephews by a sister who's into black guys, I have been witness to more than a few situations where it was blatantly obvious they were being treated differently. On one occasion, it was equally obvious that I was being treated differently, simply for having them with me in a place I've been to numerous times.
The race issue is very complex, and not easily understood by many. Both sides have a difficult time understanding where the other is coming from. Both sides need to be honest with themselves about what it is they've done as a community to contribute to the issue. Then do something to fix it. Sadly, most people have a difficult time owning up to their uglier side.