Heh. Down here in PR, “bilingualism” gets a bum rap because it’s portrayed as a codeword for a nefarious plot to teach our kids so much English that they’ll assimilate into Anglophone culture and vote in favor of Eeevil Statehood. 
Of course, then I have to deal with the wackos in the Far Loonie Fringe of the statehood movement who think that WOULD be a good idea as a policy :rolleyes:. Fools to the right of me, jokers to the left…
(*Meanwhile the middle-class kids have been watching MTV and reading English blogs for years…)
But yes, Tancredo and others have this nightmare vision of “bilingualism” in which eventually it becomes entirely unecessary to use English and future generations just never “assimilate”. While those of us who are sensible about it believe that what you need is a policy that accommodates the newcomer AND rewards the learning of English with the aim towards integration into the greater polity.
I’m on record in earlier threads as stating that a state as complex as the USA needs to have a common language of business in order to have the different parts on the same page, and that it behooves any rational citizen or would-be citizen to become able to interact efficiently with all parts of the polity in order to maximize their potential. But similarly, it behooves a rational businessman to cater to the marketplace: a storeowner’s function is not to make a stand for Anglo culture, it’s to sell goods for a profit. In any case, no law can defeat the marketplace, and the common language will be what it evolves to be. We’re NOT writing this in Latin, Briton, Saxon, Norman or Leonese, are we?
Just to use my own case as an anecdote, the fact I am fluent in English and attuned to Anglo culture means my job search market is not just Puerto Rico plus a few Boricua enclaves in the continent, but it’s the entire U.S. of A. If I wish to stay here, a local employer knows that they can send me to deal with stateside clients/suppliers; if I take a job stateside, that employer knows they CAN send me out to deal with Hispanophone customers/clients AS WELL as Anglophones. Also, even while here in PR I can acess knowledge sources that a majority of the locals can’t, PLUS those available in Spanish. That this means someone in each community who is just as educated and experienced and is part of the majority culture in each place, but is monolingual, loses to me, is in no way unfair.
And, of course, part of the whole issue, as Zoe points out, is that there’ll always be someone who decides to demand that the polity not just bend over backwards but tesseract itself into parallel dimensions to accommodate every conceivable case scenario. That’s the part where the polity should say, “this is as far as we go, you’re not being serious about this now.” It** is ** possible to make an accommodation without creating an unlimited entitlement, the answer does not have to be preventing the accommodation.
I would think, that more than future generations being forced “sink or swim” to assimilate linguistic culture, we should think about future generations being inculcated with a common CIVIC culture – respect for individual rights, the rule of law, proper procedures, free and fair competition, public accountability, etc. And that includes both newcomers and natives.