What are you on about? What do cultures have to do with this? And USAian protags are regularly cast in different roles (note white-washing). And the "World Series" isn't just in the movies btw.

We know the difference between Italian Italian and Italian American.

LMAO, sure, whatever you tell yourself to sleep at night. Most of you don't even know the shape of Italy, let alone the continent it's on.

We don't presume to represent two continents.

No no no, of course not. This entire discussion wasn't you getting pissy about being called USAian. Sorry, completely misread that.

What other languages call Americans is irrelevant.

Where did I say this or imply it? I really hope English isn't your first language, because you're doing a pretty bad job at comprehending it.