The problem with the portrayal of blacks, is basically multi-layered. Each reason just adds to the pain it has inflicted upon this group of people.
The biggest problem, in my opinion, is the centuries old attitude of "the whites still think they're better than us", in the South, that is mainly true, but things are starting to thaw in the West and Northeast, but that attitude among the African American population still remains. These days, African Americans have taken to follow the sayings of Brooker T Washington, who supported a separatist ideal, rather than an integrationist ideal. This has actually caused more problems than it was supposed to, because the outcome is that the African American community is basically like pre-20th century American, isolated, but at the same time, they are quick, almost too quick, to lash out if they feel that their own is being threatened. Of course, if they weren't given many chances to FEEL threatened, than none of the problems would have happened. Unfortunately, this is where our supposedly "free press" comes in.
I live near Oakland, and there's quite a lot of drama that occurs inside the city that really, shouldn't be of that much concern. However when stuff does happen in the black community, the local news covers it like no tomorrow, and the community laps it up like a bowl of warm milk. Each petty crime to each major crime, such as the shooting of Oscar Grant, just adds to the heated emotions of the black community. The day of the protest for Oscar Grant, Oakland Chinatown basically has a mass exodus as Chinese people fled the city, hoping their windows wouldn't be broken...but they were, but not by the Oakland black community.
Another catalyst would be...I don't want to say it so spoilers, beware
white trash, because during that fateful Oakland riot, they say more than 100 odd people were arrested, very little, actually from Oakland, and surprisingly, a lot of them were white/Caucasian, whatever you wanna call it. It may be a stretch, but "white trash" are frankly even worse than blacks, and they're vindictive, most likely jealous, whether they are aware of it or not, that the underdog has risen above them, as many black people have become successful. By inciting violence, "white trash" basically set up bad names for blacks, so they jump towns and "join in on the action". Of course the media covers that as well, but it's very brief, since...well the media is not exactly..100% truthful
The main problem I believe still lies within the African Americans themselves, but with the right sequence of events, I believed that could've been solved, with the catalysts adding fuel to the fire though, it has made trying to escape from the world of hate created by this concoction near impossible.
Take note though, African Americans. I will say this...and again and again. If given the choice between supporting the "Negro" and supporting the Chinese...America will always support the African Americans, it's just so true. Though, I might just still be a bit bitter about California's complete ban of shark fin.