Well Mexico feels some of our US territory was once theirs, so there is a level of resentment IMO.
Also the nearing nations with people here who can just step back over a local border to go home and who don’t have to go great distances to get here have no reason to assimilate as they used to when they came from Europe.
We have so many residents here who are on the dole. Why haven’t their residency been removed since they are not supporting themselves?
That requirement was effectively removed decades ago when Democrats traded the self-reliance requirement for their damned votes. I brought my wife home in 1976. I SWORE that I'd never let her become a burden on society or go on the dole. I've kept that promise. They, Mexicans, have not. To the contrary, the first thing they look for is a hospital to download their anchor baby and speak only "medicaid" when asked about the bill. God Damn them.