Racism and Spanish worship. They don't like speaking English and much rather would be a rich Mexico than rich anglo-america. I am not saying that it means they will join Mexico, but what uses to be Spanish empire colonies/Mexico and now is usa, will begin separatism in 25-50 years. The whites know this, which is why Trump is coming down as a hammer with ice to reduce Latino population by a couple of million. But it won't help, since Latinos are already double digit in % ( 11-14% iirc) and have far higher birth rates than whites, plus illegal immigration cannot be stopped, it's whack a mole that you lose over long term and best Trump can hope to accomplish in his term is kick the problem down another generation.
This is reality of north American geopolitics: The American empire has Latin huns at the gate and they have already settled the American empire enough to be more than 1 in 10 and rising fast due to 2x greater birth rate. Especially in these Mexico adjacent states they are already well above 33% of population.
This is geometric progression math, where 33% can become 80% in just 50 years, if they have 2x the growth rate of the 60% demographic and all their numbers are in tens of millions.
In the battle of demographics, math reigns Supreme and here math is decisive. California, Nevada, new Mexico, Arizona, Colorado & Texas will be 50%+ Latinos by 2050 and most likely Florida too. This is a significant % of us territory and though agriculturally challenged, it is resource rich and still number in tens of millions and is most definitely a viable nation on its own.
The us puzzle will be broken from within. Not outside. Because those of us who re here know, usa is basically a frontier slaver land culture trying to pretend really hard it's a bastion of tolerance and multiculti, like India or Thailand or Iran, but it is at its core, very racist and very dog eat dog ultra capitalist. And differences are already accreting in the us of a to break it up.