Not sure why the defense would have to justify why a minor was armed and went to a protest miles from home. I'm sure there were rioters and looters present that were miles from home. Does the prosecution have to justify their presence at the riot?
Turns out they were in the wrong anyway. The cop that shot Blake was deemed justified in doing it.
Not one thing you said is relevant. Not one. Doesn't matter if the shooting of Blake was justified. It doesn't matter if there were 'rioters and looters' present. If they committed crimes, they should be arrested. Rittenhouse came to an area of civil unrest with a gun that he was not allowed to possess. He was not invited there by anyone. He killed two people with that gun, and then fled without contacting 911 or telling the police ON THE SCENE what he'd done. Your defense of this behavior is puzzling to say the least.