If I apply for citizenship in Iceland and get it, why should I be FORCED to speak Icelandic? If I produced children and only taught them English then so be it, it's our choice. We're only hurting ourselves. By not speaking the obvious native language of a country you only limit what you can do in your lifetime.
Do you think the Spanish speaking fellows are going to secede a few of our states or something?! Seriously, what's the problem? Yeah, it's a little annoying when I look at signs and realize I'm reading the wrong part of it cause it doesn't make any sense, but that's irrelevant. If we want to create signs in English and Spanish, hmm, they're obviously trying to attract residents to live there. I dunno, maybe to boost their economies?
And so yes, it's sooooo horrible that the dirty Spaniards are only speaking Spanish because they'll never be as successful as English speaking people are. OH NOES, THAY'RE INVAZDING UZ. They want to live in a cute little Spanish commune? That doesn't affect me. It shouldn't affect you. Avoid them, ignore them, or god willing learn to TOLERATE people who you don't 100% agree with on every issue.
America: Home of the free, as long as you look, speak, and act just like I do.