Thank you for the clarification. I do feel in some ways this is just a complex argument for racism and I have heard similar intricate arguments just like this to justify racism. This may not be your intention, but I think it is important for you to know this for the future.

https://www.princeton.edu/news/2020/05/19/people-diverse-areas-community-identity-supersedes-racial-ethnic-differences

What we find sociologically is that your "common sense" about homogeneous society is anything but.

“As diversity increases, people paradoxically perceive social groups as more similar,”

Essentially a non homogeneous society will increasingly accept other social groups as normal. This kind of puts your entire theory on its head, although I do see the point you are getting at.

Your denialism over China is both bizarre and telling. You are definitely acting as a campist as I had guessed already. I don't have a dog in this fight so to speak, but I am also not here to be gaslit by an authoratarian apologist.

The reality is China is an just another oligarchy. They have probably the largest wealth gap of any nation in history and are pumping out more billionaires than the US the last three years. They are now the fourth largest supplier of arms to war torn nations and they have a long history of imperialistic endeavors.

China is great because of the US, not despite it. They have both conspired together to create wealth for an extreme minority. Trying to bill China as the lesser of evils is pretty silly even if I would generally agree just because the US in particular has caused more death and destruction than any nation in history.