Illegals. Well you have to understand the La Raza movement. Like Wholley said they don't care about becoming citizens. Most of them hold the US with contempt. The educated in Mexico and their academic traitors pre-positioned in the Universities here advocate the establisments of ethnic enclaves and seccession eventually and a re-unification with Mexico proper in the future.
I have professors who believe this crap and support it.
Another thing to consider is the UN and G-8 in both our countries immigration problems. the G-8 doesn't care about nationalism, right and wrong, just cheap labor, making a profit, making you and me, the rihtful citizens of our perspective countries poor and the global peasants they desire to lord over.
The UN wants to be the world governing body. Their constitution mirrors the Soviet Constitution, their military arm is set up like the Soviet military wing.
Their UNDHR's of 1948 undermines free will, self determnation and rights of nations to do what is best for themselves. Basically you must lower your standards of living, your culture to raise the rest of the worlds.
The UN also has a plan and maybe Frank knows the exact name of it, I can't remember it, but it is a plan to relocate the 3rd world to the western countries because of geographical locations where they currently are dictate much of their lifespan, cultures and inequality.
Between the globalists making a bundle in this plan and the UN's lust for global communism we are pretty much screwed. And your immigrants who like ours come to your country today wanting the best your system has to offer while refusing to support the system and spitting in the face of your nation and mine is all a result of of the Globalists and the UN.
This is the New World Order, Neo-Liberalism, and Globalisation.
Call me an American, but I value individual rights over the collective.
The best anyone can do is resist. Stop supporting a system that favors your demise.

Let them call me a rebel and I welcome it, I feel no concern from it; but I should suffer the misery of demons were I to make a whore of my soul. (Thomas Paine)