Even with all the current police injustices, the negative impact from them is less than the impact if they withdrew from the neighborhood. In that sense they are a net good. Of course people want the peace and prosperity reduced crime brings but also want less authority looking down but most of all they want economic opportunity when they know its available to other communities, its the immediate contrast which is most damning. I.e. your neighbors have it good and you don't and society tells you you can have too but for the life of you, it seems like a scam is being played on you.

This however is a long term issue. It's generational. The community has to help itself as much as it needs a helping hand from others. Community organizations which give people support, direction and even punishment. But lots of that is missing and you have disaffected people and opportunists who take these circumstances as an excuse for more violence instead of trying to build something positive.