Generally incorrect.
In my experience on this board and in life most righties, with some notable exceptions, seem to have a wait and see attitude. While, every indication in this thread, and the screaming I've heard in life, shows that leftists have a "he's guilty" and not a wait for the trial attitude.
I believe that the trial will answer this question to my satisfaction. Juries get to see and hear more than I'll have, and I generally trust the system.
I think you mistake a presumption of innocence with an assurance of acquittal. You have to prove that he wasn't being attacked and that he maliciously attacked the kid. That he was never in danger... etc. I don't think it is likely he'll be convicted, there is simply too much evidence that GZ was defending himself.