Protests are an opportunity for those in power to fix things before the protests escalate. They were fine with things as they are now it has escalated. Burning witches might not be enough this time.
This doesn’t seem to be a question in good faith, but in the event you genuinely don’t understand: the protests are about police brutality and violence.
Protestors don’t have the authority to police themselves, but you seem to want to trivialize their cause because you disagree with the actions of some.
Wanting an accountable police force that does not brutalize those they are sworn to protect is a reasonable request.
End qualified immunity.
The fact that there has been a large amount of violence committed by the police against peaceful protestors and press serves to generally support the cause of the protestors. There is a large amount of video evidence you can see for yourself as well as many protestors have been interviewed repeatedly.
Perhaps listening and reading instead of asserting or injecting your own uninformed opinion would lead to more answers.
I've learned the hard way to not engage beyond an initial probe for dialog. There's significant portion of the population that leans authoritarian and that will reject any threats to that authority.
It's a fools errand to try to convince most people to change their minds on any matter, and doubly so for those within the aforementioned group.