I know first hand what Mexico is like, not only on immigration issues, but most issues. Mexico is not PC in any way, shape, or form. Mexico has no sense of humor and prosecutes to the fullest extent any foreigner who so much as sneezes wrong. They have no real justice system in reality you deal with whatever official you happen to be dealing with. Odds are very good you will not even get a trial. If you are imprisoned or even shot by an official, there is no repercussion unless you happen to have important connections in Mexico. If there are any bleeding hearts in Mexico they are kept silenced.
Knowing this, I get really ticked when a Mexican official chooses to lecture us on our treatment of illegals in this country, or tries to tell us we can't build a fence, enforce our immigration laws, or create new laws.