I think Zimmerman is toast. He was stalking his victim. Encountered him. Shot him. The rest of it is just window dressing.
I disagree. Zimmerman had every right as a member of the neighboorhood watch to follow someone he thought was acting suspicously in his neighborhood. If the suspicous person then turns and assaults him of course he has the right to defend himself. I’m not sure where your strongly held “feelings” come from, but it doesn’t appear to be based on the known facts of the case.