America is far from a monolith. Our states roughly equate to different European countries with vastly different cultures, foods, rights and laws.
We just speak dialects that are almost all the same and roll up under one political entity. It is not so dissimilar than the EU, otherwise.
We are, in many practical terms a forced confederation with a shared Constitution. There are those, like in the EU, who want out.
Edit: the shared single language is one of our under-recognized super-powers. I can travel this huge land mass and communicate viably everywhere. It is key to our cultural impact. It is accidental, but helpful to us. Except when we have people who dislike our impact and become hostile.
If I drive 45 minutes east, I'm in something akin to the US south. Extremely conservative in specific ways. North a few hours and everyone distrusts anyone who didn't grow up there.
45 minutes west and I'm in everyone's favorite (not) failed city, San Francisco.
And those very conservative places I mentioned.. are quite different from south conservative. They drive the same vehicles, wear the same hats, but don't hold the same values.
California, for all its notoriety as being overly accepting has known pla es POC are advised against visiting. Some areas are very non-church and others are profoundly Christian or other religions.
We have enclaves of near-pure ethnic/cultural people tracing back to wherever. I'm not simply talking about Chinatown or Japan town.
We're not a monolith even within a small area. I didn't assert that the EU was. Only that we are more diverse than credited.
Particularly when the topic arises by people comfortable talking others how to be when they know nothing of the person or people.
You continue to assert I, or others, are saying things we are not. I have not alleged that the EU is lacking or "wanting."
I'm saying the US is far more diverse than is often credited. People are moving from one state to another because of that very reason. It is a confederation of states, by law. And our SCOTUS is making that more true each year.
I am not saying "parity" but I am saying it's far closer than your broad brush comments.