One of the best officers I knew quit after being called to a protest over the killing of a black man. He had to stand in front of people who he may have agreed with and take physical and verbal abuse. The last thing he told me was "In insurance they don't throw bottles at your head for doing your job."
I still know a lot of good people in law enforcement, but things like that sure do make it difficult to encourage good people to stick around.
Here in Melbourne Australia, honestly, VicPol are fairly good and give us all a lot of leeway (they genuinely seem to want to keep us safe).
I know its not the same elsewhere though, but in general, the people here mainly complain about the police because
The complainer is an asshole, or genuinely do a lot of dodgy stuff and deserve it. Generally Meth heads, or shitty disrespectful drivers
The only other complaint I've seen is that they don't solve someone's problem (like recovering stolen bikes). But, that sometimes isn't easy and can't really blame VicPol
US police in the south were an outgrowth of slave catchers, US police in the north were an outgrowth of strike breakers – now we give them free military surplus equipment …
This is exactly the source of the problem.
If all leftist cops quit, the police will obviously have a right bias. You should encourage people who agree with your ideology to join institutions that have power.
Same with the military. Why is there a disproportionate number of nut jobs in the military? Well, part of the reason is certainly because leftist social circles straight up bully anyone in their own ranks who would consider joining. edit: this applies e.g. In Germany much more than in the US. I crossed it out to avoid getting criticized by the us defaultism crowd.
I meant that more general than the US military. It certainly applies in Germany for example, which is much less involved in wars around the world.
But even if you want to restrict your view: Yes, even the US military complex could do with some left leaning people in positions of power. Who is advising the White House on where to send its military? Some random communist literature student or the military (with heavy commentary from oil and gas industry leaders?
Yes, of course. Do you think right wing cops will treat leftist protesters fairly? Who is supposed to prosecute 6th Jan actors? People who are sympathetic towards their actions? Surely not.
If you want leftist protests to be treated fairly you need cops who agree with the protesters.
The problem is structural. Encouraging more left-leaning people to join these institutions will just make them very unhappy and likely to quit later. Furthermore, you can't really abolish a broken institution from within.