Looting and burning unrelated businesses have no justification whatsoever.
It seriously blows my mind anyone does think this is justified or supports it. That is way beyond reason, even from an understandably aggrieved point of view.
The police largely function as protectors of personal property and relationships of ownership. I mean, look at the very reason that the cops arrested George Floyd; an alleged fake $20 dollar bill. In a time of pandemic 4 police offers showed up to enforce the ownership of capital.
Those guys who the state dispatched to enforce the value of money then ended up killing a guy. Its quite possible that the people who are rioting and protesting feel pretty damn angry at their treatment under capitalism and don't give a damn ownership of resources right now. They might even feel angry about ownership of resources in general. This is their community, and I suspect it's not yours. They get to decide their relationship to owners of resources, not you.
Once burning and looting starts, well it's like fire, or panic buying.