Uh, no.
Other then the Miami Cubans, who actually had their property taken at gunpoint by Castro, the mass of Mexicans in the West may have some ordinary social conservatism - they hate queers, it’s the worst thing you can call a Mexican - the rest of them are violent nationalists, and not the American nationalist kind.
They simply want to erect a Spanish speaking nation on American soil because a) they think this is their land and b) they can actually make real money here.
The war between Catholic Spain and Protestant England never ended, certainly not in West Spain, commonly known as “Mexico”. And if you think they forgot about the war, uh, no, again. They know that they can’t beat the gringos with their decrepit military, but they can by simply walking in and using the gringo laws against them. This is why places that were lilly White since the 1850’s in California (e.g. Anaheim) are now absolute majority Mexican. Er, “hispanic”, whatever that is.
So no, they don’t resent illegal immigration. Los Pochos only think Los Mojados aren’t as smart as they were when they went North 30 or 40 years ago.
You really need to live it to understand it. And you need to know them, and understand that they aren’t kidding.
That isn’t what I’ve heard from many of the long-time American citizens who have been interviewed over the years. They intensely resent illegal immigration.