America has a long history ((well, actually a very short history, when compared to most other nations)) of assuming everything is about herself and proudly proclaiming herself the most magnificent and important thing since the dawn of time.
i.e. no prophecy has to actually have anything to do with America in order for Americans to think it has everything to do with us. a lot of people here are convinced that every Biblical prophecy about the blessings promised to Israel are all about America, and have nothing to do with literal Israel, for example.