In general to police violence though.. I've said it before on here, as have a few other posters. Police violence is a symptom of racial problems, its not a cause or the root.
Imagine you have two cats...
One raised in a loving home, as such has no history of violence at all
One grew up in an abusive home with owners who attacked it, and has a history of biting/violence.
If you go up to those two cats, and both cats jump towards you.. how do you react?
Differently is the answer. Imidiatly your defensive and scared with the second, likely you lash out and hit it away. With the first your calm and embrace it.
Whose fault is it that you act differently to the two cats? Its not your own, its the abusive family that failed the second cat.
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That's the analogy for policing in the USA. Statistically speaking its so so clear that black communities are more violent and dangerous then white communities. As such if your dealing with the worst of each, as police do, your naturally going to be much more on edge and far more scared/nervous when you deal with the more dangerous enviroment.
But does that mean its black peoples fault? No. They have been failed by hundreds of years of racist systems (the family in the analogy) that has consistently failed them, and left them in the state they are in. Poverty and crime go hand in hand, and given that none of American history was black peoples choice, you can't blame them for what has happened...
Does that mean its the polices fault? No, they are just reacting to an unfair society - they are a mirror, that's showing us the faults and flaws in our society, they aren't the cause of the flaws themselves.
The protestors who have a bit of intelligence get this and their plans are to change the entire system and elevate black communities out of poverty and crime (very difficult, but perfect aim).
The protestors who don't get this are the ones who want to defund the police and think the answer to police violence is not having police... They just lack the ability to connect things into the bigger picture, and are attacking the symptom not the cause. They are conceeling the rash, rather than threating the virus that's causing it.
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So in short.. don't hate the police, hate the system/history that's got America into this mess.. Don't close the police, but instead do everytihng to elevate black (and all impoverished) communities.