Possum brings up a good point. Racism of the past is gone. I would argue that these days, a black man is on equal footing as a white man. However, a portion of the black community obviously doesn't feel this way.
Actually I would argue specifically that the institutional racism of the past is gone. In many situations the black man is actually advantaged by government. However, in dealing with the police this is not the case, as a black man is still, all things considered, much more likely to be unjustly victimized than is a white man. There are some valid reasons for this other than (and in addition to) racism, but that an area's dangerous thugs are mostly black is cold comfort to the law-abiding black man treated like a thug because he is black and otherwise fits a certain profile.
I would also admit that while the racism differential is largely gone and whites are not significantly more racist than blacks, the effects of that racism is still largely one-sided. If one is a welder or an electronics repairman or a DJ or a Bible salesman, the odds of every available employer being a white unwilling to hire a black are orders of magnitude greater than the odds of every available employer being a black unwilling to hire a white, especially in small Southern communities. The greater population of whites and the economic advantages of a few centuries of systematic and systemic discrimination mean that parity in behavior does not equal parity in experience, and won't for some time.
EDIT: I should add that I've experienced cop discrimination in its very lightest form. My wife and I were driving south of Atlanta at night in our old pickup truck. She was snuggled up under my arm and had on a ball cap with her hair underneath. A cop car with two cops blew by (unlike me, NOT driving the speed limit) and then braked hard to fall back beside us. They paralleled us for several miles, shining a flashlight on us, until my wife sat up straight, took off her ball cap, and shook out her hair. At that point the flashlight winked out and they sped off. Oddly enough had we been black we'd have been fine, but had we been two gay white dudes we might well have been pulled over and introduced to an ass whoopin'.