You don't fix large societal ills by punishment or playing the blame game on singular individuals.
I agree. That's why there should be a separation between discussion about societal issues and any individual criminal case. The individual case is always about what happened between the actors involved and the law, not society in general, not how some race feels they are treated and not about policing in general.
It is about the specifics of the case and in this instance people have tried to drag a whole load of crap into the ring and have had to go home disappointed as a result because if officer wilson shot MB in self defense then it doesn't matter what happened in any other case or what those other complaints are about or how legitimate they may or may not be.
This seems to be a fundamental reality that the black protesters and the family don't seem able to grasp. They seem to genuinely believe that if lots of black people have had unjust treatment that the cop who their son attacked should pay for it all.
Stupid people told stupid things.