"Other countries have some bad police too" is reductionist, simpleton bullshit. I'll spare everyone a multiple paragraph self-fellating homage to my own world travels as they've already sat through yours, but I can tell you that I've been around the world enough and talked to enough people to know that minority's fear of police is exponentially worse in America than most places.
The US kills people at 30x the rate of Germany. 3.5x the rate of Canada. 4x the rate of Australia, which is a good cultural comparison to the US.
It's not naive to think that we can bring those numbers down. The racism will fade to background noise as boomers die off, we become a majority-minority country, and they become marginalized. Once the bigots get pushed to the background, the obstacle will be people like you who sit back, shrug your shoulders and say "lol at people who think we can't do anything about the fact that our police kill people 3000% more often than our counterparts in Western Europe".
Look, if you want to continue to be a passive-permissive part of the problem, so be it. But telling people who want to change things that it can't be done or that they're naive is actively and intentionally counterproductive. Find another avenue to make yourself feel like the smartest guy in the room instead of standing in the way of those who would like people of all colors, but especially those of color, to live in a world where they aren't terrified of the people they pay to protect them.