I'm not really sure why I'm bothering to reply to your arguments, because I believe that you are making them for effect, rather than from a genuine position. But there are points which warrant making, in any case.
First of all, your attempt to sneak a partisan - "well, it was just the same under Obama" - angle in is just a tawdry attempt to "dead cat" the whole thing. It doesn't matter what happened then, while what is happening now is so egregious and, frankly, wrong. Do you think a democratic state should operate on the basis of paramilitary types grabbing people off the street and hurling them into vehicles to be driven off at speed? Or that the police should be equipped like something out of Robocop? Do you think that is a good basis on which to run a fair, equal, democratic, and well-functioning society? (don't bother answering - the questions are rhetorical).
The problem with - in particular - the US is that the inequalities, on race, poverty, etc., are structural. They're built into the system. People have tried all means short of (and including) protest to change that, and NOTHING HAS WORKED. Black men still die at a far higher rate than their white counterparts; people are still dying of avoidable causes because they cannot afford the stratospheric cost of treatment; voting precincts are regularly subject to gerrymandering that is blatant and ongoing, and so on.
Protest - and thus violent protest - are an inevitable consequence of inequality and injustice that has not been addressed. For what it's worth, the insistence of those in certain quarters that it's merely about some latent criminality spontaneously surfacing is wishful thinking - the only way they can find to offload the blame that is rightly theirs for what is happening.