Looks like this is a two part event.
1. Zimmerman was racial profiling on a neighborhood watch. His intervention was racially motivated.
2. The confrontation was intiated by Zimmerman and was clearly wrong. This is where He should have backed off, and if possible where Martin calls the police to say he is being stalked and confronted. Im not saying Martin was wrong.
3. Verbal jabs are one thing. But if Martin was in fact beating Zimmerman as now reported and perhaps backed up by a witness, then this is where it takes a huge turn legally. Remember, right or wrong the florida law is the law. We can argue the law all we want but the law exists. IF Martin was beating Zimmerman Martin becomes liable at that moment despite all that transacted up to that moment. Yes Zimmerman provoked him into a confrontation but we don't know exactly what happened. Was this a sweet innocent kids on his way to his pops house to watch a game, drink iced tea and eat skittles but could not tell this guy "hey, im going to my pops around the corner, why you following me?" Or, "Im calling the cops", or simply keep walking? Instead he confronted Zimmerman. If he confronted him with a beat down, Im not saying he deserved to be shot by any stretch, but Trayvon transferred the liability form Zimmerman to himself.
THe issue is what crime was commited by Zimmerman? If he provoked the kid into a confrontation he is liable up to the moment he gets hit.