I think it's less about that, and more about being miffed that some foreigner would come into your country, and demand that you speak their language, instead of the other way around.

I mean, if someone from Mexico went to visit America somewhere, knew no English at all, and then not only that, but actually got indignant that whatever American he talked to wouldn't and probably even couldn't speak Spanish back to him... the American would be like are you fucking kidding me get the fuck outta here. And yet, that is the attitude that most Americans seem to take, when they travel to foreign countries. I can understand some of those places getting a little miffed sometime. :-P

As for that last, *shrugs* see my comment to Zelox below.