Well written, nice work.

Can I throw out that our country has mostly embraced a 'might makes right' attitude when it comes to conflict.   If we won the war, then justice was served.  If we win the fight, it's simply survival of the fittest.

If were were permanately trapped in our animal brains, the violence would be 'normal'.   But we aren't, we are a species that has shown a great level of cooperation and adaption than any other complex creature on the planet.  We are capable of keeping our emotional/reactive self in balance with our rational self.     But it's seldom in perfect balance.     We have to be careful not to give in to the cynicism of those who look forward to the fight (which they would 'win' of course, because justice is only on their side).

In fairness to the police, the capability and use of violence has grown mightily by the bad guys.   Clearly the police are often vulnerable to such attacks.   I can't say that I wouldn't be ultra defensive if I wore that uniform.