The person in the screenshot replied to me:

My opinion is based on personal experience. I lived in Orange County, California for about 10 years. The ER example is specifically drawn from when I caught pneumonia in the early 2000s and needed to go in for emergency care. The number of people in the ER waiting room was staggering, and included a large number of obviously Hispanic people not speaking English. I do not know what my final wait time would have been because I decided to just go home and drink a bottle of cough syrup rather than wait in the ER.
I’ll gladly concede that I do not know, for a fact, that the Hispanic people who didn’t speak English were illegal immigrants. But I think it is reasonable to assume, given the location and their lack of English, that a large number of the other patients were illegal immigrants.
I will also concede that what I have shared is an anecdote. Like most people, I do not have infinite time to research policy topics so I can win arguments on the Internet. Maybe the anecdote is valuable to you, maybe not, but I lived in OC long enough to know that people go Republican there largely because of the immigration overload.
I also suspect you are right. San Clemente is really upscale. I lived in Costa Mesa, which is much lower class. I suspect we had more undocumented workers living in Costa Mesa than San Clemente, but again, that’s data I just don’t care enough about to research.
Also, for whatever its worth, I don’t think the answer is building a wall around the country or whatever draconian nonsense the GOP dreams up. They are just xenophobic. I think we need the feds to start subsidizing border communities to help with infrastructure needs, I think we need a more reasonable legal immigration system so people aren’t so desperate that they will sneak in, and I think, frankly, that we need to give amnesty to anyone who has been here 5 or more years. Its wrong to expect border communities to bear the cost of unfair immigration policies, but its worse to designate a class of people as permanent criminals who can be deported 40 years after the fact. There’s literally a statue of limitations on rape in most states. How is wanting a better life for your family worse than that?