well op. if i really try i can look at this from a viewpoint outside of your egocentric subjective one. I know it sucks in your view to have these other creatures invaliding your country and sucking off whatever resources are offered and pissing you off, but here it is from another point of view.

Its not your country, its OUR planet. The entire animal kingdoms. You just by sheer chance got squeezed out of your mothers vagina in America, rather than Liberia or China or somewhere else. Sheer chance.

Those Mexicans you see going around, they're just like other versions of you, living out this reality but by the same roll of the dice, born in another country in another body, and if you were them you'd also feel you needed to take your family to another area of land which offered better resources.
Its just a planet for fuck sake, we should all share it actually.

You know i think we as a human race should grow up now. Arent we past ethnic cleansing and killing millions of each-other over our petty differences..
Anyway, that will never happen whilst we have antiquated obsolete religions that control every aspect of millions of peoples lives and ideologies. That is ISLAM, CHRISTIANITY , JUDAISM, HINDUISM.
They will lead us onto the path of destruction. And thats where nearly every country in the world is heading right now.