(Edit: In the event that you honestly don't know which one is the more important topic, right now or pretty much any other time - police frequently murdering black people or some store windows getting smashed and merch stolen - it's the police murdering black people.)
Evidence abounds.
They committed police brutality, at the protests against police brutality. It genuinely boggles the mind.
But what do you honestly expect riots to lead to? Concessions? Or loss of the moral high ground and even more riot gear and tear gas and escalation?
It's just handing the cops a free pass to justify arresting you. And not just arresting you, but charging you with something that could actually stick. Its hard to advocate policy when you're serving a decade in prison for arson and conspiracy.
Crowd control is a science. And you are sort of ignoring the science by claiming that rioters are the cause of the conflict.
Things escalate when someone escalates them. Sometimes that's the police. Sometimes it isn't. And even when it is, you still have to be willing to be provoked. Don't.
We have people in this thread justifying riots as "we tried kneeling at football games" as if there is some kind of reasonable progression from there to looting and burning down churches.
Reacting when violated is a natural reaction. With a group this big you cannot think in individual terms. If provoked there and there is a non-zero chance you’ll see a reaction, you will see a reaction. And now you have a positive feedback loop between the police and protestors that may escalate into riots.
I'm not convinced the rioters care about police violence either. From what I ca see the riots are outside groups with riot and anarchy as an agenda. My right wing friends are blaming George Soros, my left wing friends some nameless white supremacist group. I have no idea what the truth is, and don't expect to find out for months if ever.