I know I'm in way late, and I'm about to go to bed so I didn't get to read all of this yet, but.. I'm sorry, fact of the matter is, blacks are the most racist people on the planet, if you don't count certain sects of Jews who believe the Earth belongs to them and everyone else is here soley to work for them so they can reap the rewards. They're not racists per-se, more like supremacists.
Anyway, blacks are very open about their racism too; they don't even try to hide it. They'll say racist shit loud enough for you to hear in public, and they know you hear it, but they also know that society wont ever let a white guy defend himself or his race so they don't give a shit. They almost do it as a flaunting power-trip! They also know that if you say anything, you'll shut up and go away if they just start screaming real loud and flail their arms all over the place while swearing and appear to be as upset as humanly possible. Or better yet, some nearby white couple who's chalked full of white guilt from the media, will jump down the original white guy's throat. It's probably funny for you guys to watch!
I should clarify that when I've been saying "blacks" up there, I meant "niggers"; they're 2 different things, just like there's whites and white trash, latinos and spics, chinese and chinks, etc. So, I don't mean to disrespect any blacks. When you see whites being racist, 99% of them are talking about niggers, not blacks. If you're not a nigger, then don't worry about it; they're not talking about you!
Also, the reason you see so much racism on the internet, is that we're not allowed to voice our concerns anywhere else; it's been completely stripped in the USA. So out of frustration, what would normally just be a voiced concern, turns into vile, hate-filled racism by the time someone actually sits down to let it be heard. I'll elaborate more later, but this should be a good start for now.