I know, but just listen for a second, ok?
The problem with racism isn't that it's mean or morally bad. It's that it's inaccurate. If you say that blacks suck then there's no way to explain a black guy who doesn't suck or who is smarter than you are, and there are plenty. If there are enough exceptions to the rule then the rule measures badly and should be questioned, no?
The main problem with black people in America, as far as I can see, is that they are often racist idiots who would write me off as no damn good on the basis of my skin color. What, my response should be do the same inaccurate thing? No, I'm not going to walk through their neighborhood at 3 am, not because 'blacks r no good don't relax' but because I assess it as having a high idiot density.
Just meet some people. Join a BJJ club or something. Some people are going to suck outright, some are going to suck because they think that you suck, and some aren't going to suck at all. If you're being honest then you have to admit that you don't know a dude until you meet him.
Yes, history of a skin color is a stupid concept. Some major pillars of Western Civilization were the Greeks, Romans, and Jesus. Not black people but not white people either.