Dream on. There isn't going to be a fence from CA to TX, and it's nothing short of laughable to honestly expect one to be built.
If they come here then learn English and fully assimilate into our society... no more ballots printed in multiple languages, no more forcing teachers to teach in Spanish (as in Dallas, TX)... I could go on.
You know that's the amazing thing about my state. Here in Texas, we've gotten along fine side, by side, and only the occasional bigot demands that hispancis anglicize. For those that don't like it, Texas has busses heading in all directions out of state 24 hours a day.
People from many nations have immigrated here, and are willing/want to learn to become an American. That is not true of all immigrants.
I have been told by some native born Texans of hispanic heritage that this is their land and they will take it back. In my opinion, if Mexico, etc, is so great - go back. Don't drag us down with them.
TRY THIS ONCE
Enter Mexico illegally. Ignore immigration quotas, visas, international law, and all that nonsense.
Once there, demand that the local government provide free medical care for you and your entire family.
Demand that the federal government provide retirement benefits for your elderly parents.
Procreate abundantly.
Demand that the Mexican school system provide schooling for all your children.
Speak only English at home and in public and insist that your children do the same.
Demand classes on American culture in the Mexican school system.
Demand bilingual nurses and doctors.
Demand free bilingual local government forms, bulletins, etc.
Deflect any criticism of this irresponsible behavior with, "It is a cultural United States thing. You would not understand."
Keep your American identity strong. Fly Old Glory from your rooftop; proudly display it in your front window and on your car bumper.
Demand a local Mexican driver's license and then use your new Mexican driver's license to apply for other legal rights and to legitimize your illegal presence in Mexico.
Demand that the Mexican driver's license be acceptable documentation for voter's registration.
Insist that local Mexican law enforcement teach English to all its officers.
Insist that you should not have to pay taxes, because you are not a Mexican citizen and are only there "temporarily."
Good luck! You'll be demanding for the rest of time or soon be dead.
It will never happen. It will not happen in Mexico or any other country in the world. The only place this happens is right here. in the land of the gullible and the home of the naively stupid.
If you agree, pass it on. If you don't, go ahead, head on down to Mexico.
Gringo