They don’t think they are committing crimes. In many cases they honestly think they are doing the right and honorable thing. The Jan 6th people were more out on the fringe delusional than most, but Bryan was a more regular sort of fucked up:
“Look here’s us chasing this likely criminal. Notice how he is black. Look how he’s running and refusing to stop - he MUST be up to no good. It’s on him for forcing us to pursue and nearly run him down. Look here’s him resisting our lawful arrest and making himself a threat. Here’s him getting shot. It’s sad but we had to defend ourselves against his dangerous actions.”
This video was clear exoneration to someone like Bryan whose world view is skewed by his own bigoted, parochial outlook. That other people viewed it differently was probably at least a mild shock to the system. “No, no - you’re looking at it all wrong. We HAD to shoot him. Can’t you see that?”