Earlier quoted context omitted.
This ignores historic examples of societies with multiple cultures, religions, etc living peacefully. It doesn't always end well, but are you proposing the solution is to ensure that societies never try?
> This ignores historic examples of societies with multiple cultures, religions, etc living peacefully. Can you give me some examples? My own knowledge of history goes like this: proximity (between cultures / ethnicities) = war.
So, as far as I am aware, any nation that is currently at peace can serve as an example.
Maybe it's the other way around: the more any two groups get along, the less we consider them meaningfully distinct.