Probably the Japanese.
They consider their nation, one of the last "pure" races on this earth. They see America and Europe and all the diversity here as bastardizing the majority race and culture. The Japanese people think that nobody but the Japanese are able to speak their language? I know, it sounds weird, but it's true. Also, they are under some false impression that the English language and the Chinese language are more similar to eachother than Japanese and Chinese....apparently, this notion fits nicely with their belief that their language is the most beautiful and unique in the world....they're government tells them this, so their ignorance is honest!