My grandparents lived in NYC for 25 + years and never learned English. It wasn't to be mean or rude or to spite people. They just never needed to learn for their jobs, and most of their friends were Spanish speaking. The fact that they had about a 3rd grade education probably didn't help.

I just don't understand why Americans get so enraged when people don't speak English in America. There is no "official" language in this country and it's not as if people do it intentionally to offend you. Have you ever tried to learn a language as an adult? And how many Americans are bilingual?