I do not believe that Blacks care very much that Trayvon Martin died. After all, they seem to ignore more black on black violent deaths every day. I think what Blacks care about is that some “white” guy had the temerity and the means to defend himself from a beat down.
That is really what this is about, cow white people so that the black hoodlums can rob, steal and kill more of them with impunity.
You’re right, it’s more white antipathy than it is any sort of sorrow over a young man forcing another man to kill him in self defense.