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I believe that is similar to how the English language/accents change if you move across the US.
As an American who is only fluent in one language, I don't blame people for not being multilingual. But I do blame people who get weirdly mad about other languages existing. >

My wife had a coworker who would get mad if people near her weren't speaking English. And this was at a business that had more native Korean speakers than native English speakers >

In the middle of Hungary people get upset if someone don't speak hungarian. And complain barely audible that everyone should speak hungarian who dare to come to this country. lol >

Imagine if Colorado spoke one language, Arizona spoke another, Texas spoke their own, Florida had their own, etc. If America was like that, I guarantee the average American would know at least 2 languages. 
This is basically how Europe is. >

Ist's even worse. Almost every region in Europe has some special accents and dialects. 
There's at least 10 different germans. (29 different in total with Switzerland and Austria according to Wikipedia)
France and England are also really bad.