The 2nd biggest source of Mexican income is their people sending back money earned in the USA to Mexico.
Why wouldn’t they do everything in their power to minimize the number of non-Mexicans taking the American jobs which “BELONG” to Mexicans..?
The treacherous USA gummint asked the Mexican gov to assist in a plan for American treachery, and instead the Mexican gummint did what would benefit Mexican PEOPLE.
Which is far more loyal than the US gummint is.
Not many people realize that every Mexican citizen is automatically deputized to enforce Mexican immigration law.
If you’re a smallish, 30-year-old Guatemalan illegally in Mexico, it is technically possible to be arrested by a physically able 12-year-old Mexican.
If you’re a non-Mexican physically at ANY political rally for ANY reason in Mexico it is a FELONY.