One of the few things that I learned via the Richmond Unified School District, (aside from the three "R's,") is about the great Aztec, Mayan, and Inca empires of Mexico and South America. Being that these civilizations were empires, we all know how empires are formed, two parties to go war and the side that loses has their lands seized by the winning size and losers are absorbed into society of the conquering party.
Messicans love to bring up the fact that the U.S. "stole," the southwestern and part of the Rocky Mountain states, (in addition to California and Texas,) from Mexico. However, nobody ever seems to bring up the fact, (or remind the Messicans,) that Aztecs did the same damn thing to neighboring tribes centuries before. Not only that, the Aztecs would engage in ritual sacrificial slaughters for days on end with often times members of the conquered tribe being the blood debt to Huehueteotl'em.
Also, Texas fought a war of independence to gain sovereignty from Mexico, (you know kinda like the one Mexico fought with Spain,) even if the bullshit argument about California, Arizona, New Mexico, Nevada, Colorado, and Utah being rightfully a part of Mexico was true, what land rights do the Messcians have to Texas since Texas was already a state at the time of Mexican-American War?
Another point that is implied by the Messicans is that is the territory lost in Mexican-America was retained by Mexico, Mexico would somehow be a better country with a higher standard of living. No, instead of dying of dehydration and risking heat stroke, the illegals would be dying of exposure, hypothermia, and getting caught in avalanches from trying to transverse though high as mountains in the Rockies and Oregon would have most border crossing because it would be one of the places to cross easily.
The was a lot of shit with the racist white supremacists that ran America, but I bet if they knew the of problems we would be having from our neighbors to the south, they would have grudgingly agreed to do what the racist white supremacists slavers wanted to do, which was admit Mexico to the U.S. as a big ass slave territory, then would have problem with cats from Central America coming here and the question would be how are it would be to lock down a border that's 691 miles long.