I don't know what's hard to understand. to a certain segment of society justice was definitely not dealt all we know is a black teen was killed when he didn't start shit and wasn't robing or buglarizing anything in fact he was staying in the hood he got killed. The dude who did it is off, we have a lot of right wing folks demonizing the dead teen calling him a thug, gangbanger, drug importer.
At the same time a black FLA woman is going to jail for 20 for lettin off a warning shot to stop her abusive husband who she had a restraining order against.
at the same time the fruitvale station movie is out about Oscar Grant not barring the numbers of other black teens/men shot down in questionable circumstances across the nation by not criminals, but people who are the supposed LAW.
the peaceful people in from that segment of society will rally, the angry aggressive people will riot. It might be wrong but it will make the government react. That's the law of physics, every action has a reaction.
The sad thing about it is that even tho it will do more than a rally in the immediate it wont do shit like the riots and insurrections in the mideast, because America's divided strongly on racial lines.