I think all looting, and rioting is incredibly stupid. It pretty much goes without saying.
Unfortunately though, it all too often only seems to become a problem to some when it happens to be an action carried out by a minority. Most of which stem from systemic issues that have been building up, and allowed to fester for decades. We can improve so much, but the "well just stop talking about racism, and it will go away" mentality contributes pretty much nothing to the issues. We also have to be careful though, because some groups like black lives matter have been overtaken by individuals who just want to divide sadly. But there are still many good people doing work without taking that approach clouded by misdirected anger.
As far as having a legit serious issue with African Americans or Mexican Americans identifying themselves as such.. I have to be honest dude, that's a sketchy mindset to say the least, that does not make them any less patriotic than you, me, or anyone else.
Kind of disappointed that you could consciously apply such logic to be completely honest with you man. You gotta be better than that. For all the libertarian talk, that sounds like some pretty far right talk, and would probably fit right in with a minority pummeling Trump rally.