It's almost as if the entire southwest used to be Mexico.
Is this one of these stupid "yeah 300 years ago this used to be on that land!!!" argument? Buddy, if so, stop living in the past. Territories are conquered all the time everywhere throughout the entirety of History.
Plus, this has nothing to do with current immigration laws.
How does it apply to the specific case mentioned in the parent? How does it relate to illegal workers who somehow are now "trapped" in the US because some weird fringe program was stopped?