Yeah, there are racists & bigots out there - you can find them at every gun show. And every mall, Wal-mart, social function, office building, convention, whatever. There's always somebody who thinks because you share an interest in "X" (or just a skin color), you must agree with their entire political philosophy, and want to discuss it with you. Fortunately, they're usually about as bright as a blown bulb. Unfortunately, there's hardly ever a good way to shut them up.
I think there's a lot more covert racism than overt racism, though. I think the examples given about drug and gun laws are right on target (pardon the pun). When smoking marijuana was an evil thing that was only done by people who were from the other side of the tracks, laws were harsh - the punishment far outweighed the crime. But when the middle class white high school kids started getting busted for it, whammo, they started reducing felonies to misdemeanors. Cocaine worked in reverse - it was overlooked when it was a white upper class drug, but once it became cheap and common, the enforcement got really harsh. Guns, well, I don't think too much has changed in the last 200 years - many at the top seem to feel that it's okay for them & their friends to be armed, but anyone beneath them should be locked away for wanting to own a gun. And it was okay for poor black high-school age kids to do drive by's (even if they hit a few innocent blacks), but a over a year later we're still hearing about how we need to pass gun laws because of Columbine. The difference, I think, is that the Columbine massacre happened to and was caused by white middle class kids. I doubt there would have been Million Mom March if the same incident had happened in one of the schools in a minority section of town. The attitude seems to be "it's okay as long as it happens to them" - whoever "them" might be. It's funny, but sooner or later, "them" is "us". We're all in this mess together, like it or not.
I think gun control, drug laws, possibly even racism, etc. are simply symptoms of a bigger problem - the growth of elitism in this country.