Firing all white police officers would certainly make a dent though

Trolling isn't helpful to discussion about this topic.

Is it actually hyperbole though?

Yes. There are many successful arrests of people who would face the death penalty if convicted without them being killed.

The number of police killings are a very small number. This is blatantly obvious to anyone who cares about the truth.

And I'm strongly against police brutality.

But you don't solve that by being ignorant about what actually happened in reality.

No one claims there are never nonviolent arrests. The claim is that there are executions in the street at all.