"Here is my argument: After three months working with them, I spoke more Spanish than 90% of them spoke English, including several of them that had been in the USA for over 10 years. What does this tell me? These people are making no attempts to fit into our culture and have no loyalty to our country. In three months, I had made more of an effort to be inclusive than these people had made in 10 years. They feel that our country needs to adapt to them, and that the people of this country have nothing to make them worth getting to know or to make them worth putting any effort into. A situation like this one is very similar to what caused the fall of the Roman Empire."

How old were you? How old were the people you worked with? Were they 1st generation (born in Mexico) or 2nd generation (born in the USA)? Did you notice any difference in the amount of English spoken between 1st and 2nd generation immigrants (if both were present)?

For perspective (and your education) the following is optional: Please contrast this with another immigrant group like say the Irish during the potato famine. Please find me contemporary (to the immigration) writings about how the Irish were assimilating. Also, after the fact analysis of their contributions/detractions from American society. Also, compare the amount of English spoken by first and second generation Irish immigrants.

You don't have to pick the Irish, so feel free to pick the group of your choosing.

Also, I'd like a citation for your Roman Empire fact.