^^^ This is exactly what I meant.

People and groups with unlimited grievances (and, unfortunately, associated revenge fantasies).

Switzerland has less of this. So you can send your 5-year old for a long walk alone, knowing that your neighbors will be looking out.

(PP: even the word "rural" is seen as a dog-whistle, e.g. by the NYTimes.)

Listen: I'm a visible minority where I'm a citizen of, myself. I'm not shilling for racial homogeneity or totalitarian philosophy at all. I'm just sharing my lived experience that when there are lots of groups with lots of grievances against each other, there's less ambient, latent trust.