Being that the reaction is itself irrational and only loosely related to the event and "victim" and is a wholly emotional response, reason and logic aren't going to win it
It's all just basic tribalism. Us against them. Black against white. Us against the police... Etc. The events are often nothing more than an excuse to act out and for grievance pimps to cash in.
I heard Jesse Jackson taking about this event being part of a clear pattern and when challenged he could only list a few similar situations spanning a decade. Of course, that didn't slow him down in his rhetoric, blame and shameless fund raising while standing on a fresh corpse..