They have guns. They have the power to end your existence. So yes, they CAN treat people like this. We gave them that power when they were hired and our tax dollars started paying their salary.
I'm saying that the gun is what gives them power. They shouldn't abuse their power, but it's hard to argue with someone that will end your life if they decide to.
The cemetery is full of brave people. I'd much prefer to live, even if that means taking a little abuse for a few moments.
Well, it's not very rational to tell your objections to the same people that you want to take power away.
Yes, the police must treat every innocent person with respect and even reserve some dose of respect to criminals. Yes, it's our duty to try to fix the situation when that do not help. But no, it's not advisable to try to fix that in the exact instant the problem is happening.