I would agree that most US police are not qualified to deal with the issues of trust. Part of that is that they don't have the training, part of that is that there are centuries of bad history in the way of it, and part of it is that for police to do this in a better way would require a lot more police per 1,000 citizens, which is hard to get political support for.

I'm not sure that it's true that "most other countries" police work the way you're saying. There's a good book on the problems of policing world-wide, " The Locust Effect: Why the End of Poverty Requires the End of Violence by Gary A. Haugen,Victor Boutros".

https://www.goodreads.com/review/show/1733234333