Mexico is not a national Friend the the US. Mexicans, yeah, sure ... but not Mexico.
As for if the Mexican government would do this, even along racial lines, all one needs to consider is exactly who stole the wages of those in the Bracero program (it was officials in the Mexican government) ... yes, they’d do it! From years back they’d have done it!
But all that aside, the idea of retaking their supposed lost destiny (though no one but their own elites are responsible for that given that Mexicans make good soldiers, know how to work well, they are awash in Christianity, that Mexico has abundant valuable resources and can feed its own people, indeed it exports food) has created in some a sense of self righteous and nationally arrogant entitlement. You couldn’t give away immigration papers to some of these people because obeying our law is beneath them.
And all the while their more honorable countrymen, as well as lawful immigrants from many places, have to live with encountering attitudes and suspicions that follow in their wake.
“Mexico is not a national Friend the the US. Mexicans, yeah, sure ... but not Mexico.”
You mean those Mexicans who give us the finger while they are fondling their crotches? Those Mexicans?