The Revolutionary Communist Party (note the sign), the Workers World Party (note the signs), the Occupy movement, and the Muslim Brotherhood are mobilizing in support of Trayvon Martin's right to beat up any untermensch he feels like attacking because he is of a superior race.
(For anyone who missed the trial, we learned from the prosecution's witnesses that Martin confronted Zimmerman, Martin started the fight, Martin was the one beating Zimmerman while Zimmerman was calling for help, Martin had racist motivations, Zimmerman did not, Zimmerman was telling the truth this whole time, and everything you've heard from the press against Zimmerman was wrong. The defense only had to show up.)
Beware of disinformation. All of these groups lie their lips off as a standard tactic and justify it as a way to hasten the revolution, and all four are competent at getting their propaganda into the mainstream culture.
Why is the MB involved? My guess is political strategy, making inroads into other groups. Next guess is someone is paying them.
One thing that's interesting is that these groups have international networks and also tend to take curious positions on international issues that would coincide with what fronts for hostile foreign intelligence agencies would be expected to say. It's curious. I'd love to have a look at their financial records.