I'll tell you what change I've noticed over say, the last 20 years. It's a look in the eye. They don't hold what the gringo is and what we have accomplished in very high regard any more. They have been poisoned by incessant racial rhetoric from their "leaders". Not unlike JJ and his band of flying monkees. The opportunities created in this country for those that would assimilate gringo's values are boundless. What do the illegals, and now many legals, want to do? Tear it down and remake it in their own image. It's just a cultural thang you know.
Nations/societies/cultures come and go and since I'm not much of a historian I can't really say what causes most to collapse, but I have my suspicions.
FGS
I have never understood the mentality of the Mexican national that escapes the hell-hole his own government made for him, then trashes the nation he escaped to, in order to prosper.
Viva el Mexico is fine, but when it takes over California, California will revert to Mexican standards IMO.