The whole world knows all about Americans, but we know very little about them. They watch our movies, they read our books, they (kind of) learn our language, they come to our country. On the other hand, we don’t learn much about people whose names we cannot pronounce. We are taught, basically, that the less able we are to pronounce their names, the more like us they are. If we do learn something about the unpronounceables and their cultures, we are taught that the bad parts of their culture are sifted out when they arrive on our shores, while the good parts are retained. It is a part of that spell Emma Lazarus casts on them when they read the words on the Statue of Liberty.