My Grandmother arrived here from modern day Croatia almost a 100 years ago and could hardly speak English when she died. We would go over there on Sundays for dinner and my Grandmother and my Mom would speak Croatian pratically the whole time and my Dad would jokingly say they were talking about him.
I guess my Grandmother to you is just as "evil" as the lady you describe for not knowing the King's English. It has always been that way with immigrants. The people who come over first cling to their native language and then subsequent generations become English only. You may not think so, but I bet you any first generation hispanic immigrant can speak English well. Just like Korean or any other ehnic first generation immigrant.
EVIL????
Oh my, who is using hyperbole now?
What does everything have to be so extreme as to be Evil? Was your grandmother the moral equivalent of Adolf Hitler? No. Should she have learned the language of the country she immigrated to? YES.
She was wrong for not learning the language. 100% wrong. Not "evil", but wrong, IMHO. There is a difference. If I moved to Japan, I would learn Japanese as quickly as possible (if not beforehand). If I moved to Mexico, I would learn Spanish. It's just common sense.