So... looting and rioting has not happened outside of police brutality before? Really?
Your last sentence - basically the "argument" of "but he smoked weed/did small time robbery".
That is a nice theory that everything is ensured... Really nice, but I do not think that it is a reality. Small business owners also tend to live "paycheck to paycheck".
You quite clearly do not.
Let me remind you - one crime does not excuse the other. You CANNOT take the parts from law you like and discard the rest.
Get a grip - not everything is about USA's systematic failures. Other people also have to live. Mobs destroying lives of other people just add even more problems.
If you still do not get it - police killing an innocent does NOT give YOU rights to destroy life of SOMEONE ELSE totally not connected to the first act.
Go tell to the owner of a small family run shop that it was burned down because of systematic injustice. Go on. Would make for a funny youtube video.