Well you can't really reject all elements of American culture that have their roots in Europe as not American or else you end up without a whole lot to work with.
My pappy always said, if you shoot it and it's still standing, keep shooting it! Small, incremental changes!
One rain does not make a crop. — Creole
I always thought story-myths like Star Wars and The Karate Kid fulfilled the role of fairytales and parables for the comparatively young culture of United States. I'm only half-kidding. I bet Yoda has a few choice quotes related to exactly this subject?
Well that wouldn't be very good! Let's embrace them then.