I don't disagree with you, But I think it's even more primal than that. As if there were a phenomenon you might call "ochlophrenia", where basically being in a large crowd of people directly inhibits one's ability think or act rationally, and the effect is cumulative over time.

I honestly believe there is a correlation between population density and political insanity. It just seems to me that the more people per square mile, the more batshit crazy they are.

Again with this leftist-inspired non-sequitur that all illegal aliens are from Mexico, and are all landscapers, maids, or crop harvesters.

Anytime you want to see a real-time example of racial bigotry, just look at leftist ideology.

Many of them seem to be going our of their way to hide their faces from the camera...

They signed the Treaty of Guadalupe Hidalgo (1848).
They signed the Treaty of Mesilla (1854).
They sent some token troops into the Philippines during World War II (after some arm-twisting).

Pretty much nothing of note since.