Some people aren't interested in other cultures at all, going by what I've seen. They find it an inconvenience that things aren't how they're used to them being for them - e.g. same language, same culture, same cuisine, etc.
Perhaps that's what melting pot means? It all goes in and is melted into nondescript liquid?
Yeah, that's what I thought. It's like that in the UK too. If you don't speak English you're stupid; if you speak a foreign language in an English-speaking environment, even if you also speak English well, you're a hateful foreigner that would be better off back in your own country.