It’s irrelevant why he was there.
The issue is cops shooting an unarmed man in the back seven times.
The issue is a kid travelling from Illinois with an assault rifle to shoot BLM protestors and, it seems, getting a pass from the police on the scene. This is also the allegation in Portland where cops stood by to allow counter protestors to attack protestors with impunity.
Everything around that is just noise, an attempt to deflect, confuse and pass the blame onto the victims as much as possible. It’s like rape and ‘was the woman asking for it, dressing provocatively, was she drunk, etc’. The issue there is consent and without consent it is rape. The point of much of these posts is to portray the victim as the problem, just as there is an attempt to blame the woman for rape.