"I don't know why people feel the need to pretend to be so selfless"
*whispers* some people aren't pretending! They actually think differently due to their brains having evolved in a slightly different way to your own, ie, they actually evolved.
"If you're so selfless, how about you move to Texas"
That's not selfless, that's more self sacrificing, abandoning your home, friends, family, people you care about (I'll give you a few seconds to look up the word 'care'... ya done?). Watch, the same works both ways, I could pick an untra-extreme to disprove your point too:
If you're not selfless, why don't you kill all those around you?
See? It's a retarded point, it proves nothing, except the fact that you think in retarded terms.
"Why shouldn't poor Mexicans be able to come?"
More to the point, right now, why would they want to? Mexico's unemployed rate is half of the US's. America's basically falling apart, too many people like you who don't believe in looking after the things around you. Thinking that everything will stay completely fine for you if you neglect anything you don't know that you use directly, you end up neglecting things you don't know you're relying on until they fail and something stops working, whether they're levees, corrupt financial systems, or an education system. You can watch your own middle classes completely disapear and you just won't change a thing!
"When your standard of living goes to shit"
Ohh of course, that's why you won't solve problems, you're too busy blaming everybody else. Makes sense. Incredibly wrong, divorced from reality, but don't let that stop you.