I have no idea why you're having a go at Americans so much, this literally happens everywhere. British interpretation of Indian dishes has nothing to do with originals. Every country has their localized version of McDonald's even(Poland has a burger with saurkraut and goat cheese). German idea of Italian food is....difficult, but incidentally Germans make the best kebabs. I'd argue that the worst pizza I've ever had was actually in Italy.

There's no such thing as "authentic" food. It doesn't exist and it never did.