The dirty secret is that Mexico rivals the South African Apartheid regime in terms of racism. Fox and his cronies are white, and if they could, they would love to foist all of Mexico's Indian population on the US.
Oh yes, they are very racist. The biggest problem in Mexico is their sense of "class" which is of course based on color of skin and $$$$. That is why there is no middle class in Mexico- only rich and poor. They do not care about their poor, so they export them to US.