Living in another, highly homogenous, non-English speaking country -- reading opinions like this seem crazy to me now. Having a multicultural society is a great thing, being exposed to different languages and cultures. As for your claim you can barely find any English speakers, that's just hyperbolic nonsense. The vast majority of foreigners I have met in England can speak English to at least an elementary level (but usually pretty or very good English) as well as their native language and perhaps even more languages.
Having a homogenous society where everyone shares exactly the same culture is not a good thing, it just leads to bigotry, narrow perspectives, and moral/cultural stagnation.