One important thing to remember as reactionaries is that we are long volatility. Anything which undermines the prestige of the existing power structure works in our favor long term. What are some of the possibilities in this case?
The power structure is pretty clearly bent on attempting to railroad Zimmerman, but that's going to be awfully tough to do in Florida. My bet is the jury acquits him, and there's a good chance the grand jury would as well.
With articles like the following greatly undermining the initial media narrative, it's hard to envision a conviction.
There's also this: Zimmerman is clearly a Hispanic, specifically a Mestizo. How is that community going to take an obvious attempt to railroad him? Hispanics aren't nearly so deracinated as white people, and they know how to play in the ethnic cleansing game. This sort of thing isn't good at all for the Democratic coalition.
Lots of Republican officials seem to be eager to prove their anti-racist (read, anti white, or in this case, anti whatever the media mistakenly calls white) credentials. Romney and Paul seem to have the good sense to keep their mouths shut on the issue---and Newt attacks Obama on a meta-point.
So there's a pretty high probability that we'll get some riots out of this. While tragic for any victims of such, this only helps the cause of reaction. Look to the aftermath of the Rodney King rights back in 1992 for an example of how quickly the mood of the country turned in a reactionary direction.