The fact is you don't know what you are talking about. There are many South Americans in the south west USA. If you spoke Spanish you would be able to tell the difference. In the New York area there are many Puerto Ricans, in the Florida area there are many Cubans.
I know several Guatamalans and other Central Americans who work here. I don’t know if they are legal or illegal. My nephew and brother just bought a business in Midland, TX and had to let one of their employees go as he is illegal. Having a hard time finding a decent replacement.