Maybe that is all it is, I just have a hard time believing that is all there is to it.
I'd say that is quite a lot.
Believe me, they are all very, very worried that they are being "out bred" by the brown people. It's as ugly as it gets.
I doubt this is anything new. I'm sure the whities already here in the 1800s were terrified of the dirty Irish (who iirc were not considered "white", they were caricatured as apes etc) and later the Italians.
I've done my part, like JD, to "muddy the waters" so to speak. I have spawned two "hmm, not sure what those are" kids and it's great. So have some of my relatives--ironically, right-wingers but that's their problem to reconcile their own kids with a racist GOP.
One day we'll all be some shade of beige and then we'll find something else to shit on each other about (hopefully by then religion would be gone but I'm not optimistic)