When it comes to Americans?
If it was about any other nation it would be called out as the racism is it.
I’ve seen it today across the Halloween threads - people looking down their nose at Halloween because it’s an ‘American import’ (which it isn’t).
The attitude that baby showers are disdainful because they’re American. The snobbery about proms because they’re American. Elf on the Shelf, gender reveal parties etc. - fair enough if you just don’t like them but there are always derisive posts about them being American.
I suspect the same people embrace traditions imported from other cultures but when it comes to American traditions there is such snobbery.