I'm a black guy, and though I'll be bashed till the end of time for stating my opinions I honestly think that a lot of black guys are extremely arrogant and think that they are the best thing since sliced bread. A lot of black guys love to state that they have a big black dick even when they are swinging 6 inches; I've never understood this personally.
Now not all black men are douche bags, though there probably is a fairly high percentage, but I have found that this has a lot to do with the environment in which they live more so than anything. The level of ignorance of some black men is astounding to say the least, and this is often reflected in the way they treat women.
It is the same here in England, though not as pronounced as in the U.S, as the ghetto street culture that is so often mistaken for black culture is more prevalent in the U.S than it is in England, though I fear that many of the young black men in Britain aspire to be the UK equivalent of their U.S brethren. Surprisingly many of the women can't seem to get enough of these guys, and unfortunately believe that all black men are this way. While some of us have fought our way through education and hard work on our journey to where we want to be in live, we often find that we are grouped together with these same douche bags regardless.
In my experience many of the educated black women only date white men because they are firstly open to dating other races, and secondly given up on finding a decent black man, as we seem to be in less abundance. I don't blame the OP, and have heard similar views from black women on other forums. The interesting thing is that the guys who try to defend black men (I'm not referring to anyone here) are usually the same douche bags that the women are complaining about, and often while trying to defend us only make things worse by their inability to string a proper sentence together in standard english.