Now this I disagree with. I expect that you are interacting with a specific subset of Americans. A lot of Americans are deeply racist and xenophobic and I believe that the average could definitely get lower.
I guess I work in tech. Maybe it’s different elsewhere but even there I think it’s probably lower than most of the world among similar classes of society.
So I actually agree with you here. America has a deep, ugly pit of unconstrained racism, and a less deep pit of quiet racism that permeates a lot of society. But so do many (and very possibly most) other nations, where the level of racism is often even worse, just with different targets than Americans. I think in a way America is much more aware of our tendencies than other nations.