I lived in the UK, something I believe you know. I did so for about 5 years. Scotland, England, Whales ... these are real things. America is not.
I don't know if it ever was. I believe it has always been a playground, a place were rival gangs compete, but there is no Stone of Scone. There is a populist notion that there is something that means "American" but it almost invariable falls back (rapidly) to the points you mentioned, and there is nothing unique or distinct in any way about these things.
There is The South, there is The West, there is The Midwest ... and these are real things, and if there were lines, then they would be Nations .... and they would be dangerous, very dangerous.
I'm not saying the USA is not dangerous, but that it is only fractionally as dangerous as it could or would be if it was a Nation.