AS VIGILANTEMAN INSIGHTFULLY POSTED— Mexico still teaches that the American SW (over which they had very limited control 1821-1848) still rightfully belongs to Mexico; Mexico actively encourages colonization via illegal immigration into the US...and plots to takeback the land.
That makes illegals on US soil a de facto invading army.
And just as children born of diplomats are specifically excluded from birthright citizenship, so are children born of invading armies.
Illegals that pour over our borders are invading armies of brigands and barbarians. They are taught they are on stolen land and must lie-in-wait to get it back from the gringos. They are coached on how to become political pressure groups “for the cause.”
FWIW, my sister had a job working with mostly illegal Mexicans in Texas some years ago. She spoke Spanish fluently and said that many, if not even most of them were kind, wonderful people. But this belief is in their DNA.
They have absolutely no guilt or even remorse about crossing the border illegally, staying illegally or milking their American hosts for all they can get because this is how they've been programmed to think.