Hardly. It's just the media is full retard now. There's no reason to delve into complex issues anymore, because that can have a variety of sides, and a variety of sides means if people don't like what you're saying, they tune out. If you whip up a nation around a court case though, the sides are limited (not/guilty), and you can foster interest regardless. The media seems to be making a habit now out of blowing up court cases.
Now if you're watching the news and believing it, then it's an incredible racial injustice, this kid was innocent and murdered in cold blood. The media is solely responsible for any riots, however pathetic, occur. (Probably one of the biggest reasons there isn't any real rioting is that the police weren't a factor in the shooting, it was just a chubby Mexican who doesn't have much common sense).