Yours is a strange position. Most of us like rational people who can clearly articulate things. Sounds like you've have a few bad experiences.
I just about always get them when I talk about not registering my vehicles.
I can back into corners about their willing and even prioritized attitudes to those who would con our government. Police don’t seem to care that I don’t pay taxes. They do, however, start to fall apart when I point out how they well they are setup to guard elite assets.
I have no trouble pointing out how they are being used as the personal enforcers not for the law, but for the elite and powerful. Also, coming from CT I can EASILY show their colors by open carry of a firearm.
That’s like shooting fish in a barrel. I understand other states may not have that built-in destruct though. Here in NEPA we are surrounded by police who are very uncomfortable by armed people. Our Sheriff department seems ok about it though.. but those guys just transport prisoners and sit at the entrances of schools. We’re lucky to have a Sheriff, but the state has done it’s share of damage to the outfit.