Your notion that people outside the US are ill informed about the US is typical of an American who lives in a bubble.If you think it's right wing dogma to say that DEI is not popular in the U.S., you're entitled to your opinion. I wouldn't hold on to this idea very strongly.
I will tell you that my view is shaped from dealing with people and dealing with businesses. I used the word zeitgeist on another post here. You cannot entirely plug into the American zeitgeist by merely turning on your television and watching American news. It certainly can give you a flavor of things, but living here is far better than just getting information from intermediaries with their own views.
My views are also shaped by working with Americans and even living in America for an extended period of time.
I wouldn't make blanket statements that DEI isn't popular in the US.
Or that it is very popular.
There are regions where it is popular, and there are regions where it isn't.
The politics line up accordingly.