They are responsible for their lot in life, not the cops. The cops are simply a reflection of going where their customers are. If you have 12% of the population committing the vast majority of crime then guess who the cops' best customers are going to be?They just want to retaliate in any way they can against the "system" for it's that system, represented by cops that is responsible for their lot in life.
That said, it in no way excuses the militarization of our police force and indeed that is a contributing factor to the problem. When people feel as though they are under siege then there will inevitably be breaking points. So when you have all these cops in all these minority neighborhoods reacting to what they see as chaos and that the locals see as unfair systemic oppression, then you have all the necessary ingredients for a tender box.
So don;t be surprised when they ignite.