Why do people say illegals should go back to where they came from and is it a matter of racism?

https://thelemmy.club/post/46067518

Why do people say illegals should go back to where they came from and is it a matter of racism? - The Lemmy Club

So, today, I saw a sign on my school group’s wall saying something about undocumented people being welcome here, which I strongly agree with. They should be welcomed as much as any citizen (I’m American so a lot of this will be in relation to my observations in the USA). However, I have friends and family who are strongly anywhere from “illegals should be tortured” to a more reasonable (not saying it’s 100% reasonable, just MORE reasonable) that the undocumented should be deported but not treated badly in the process. Some, like my dad, are right-wingers who believe in changing the border laws and don’t support Trump at all (a Never Trumper I think?) My stance is that the border laws should be changed and that the undocumented are not “illegal”, they should be treated like human beings and welcome as any American should.

Furthermore, I recently saw a post saying “I’m not a right-winger, but I believe illegals should go back to where they came from”. Is it possible to be centrist/left-of-center and say that?
I’m pretty sure that post you’re talking about is from a troll account. Don’t take it too seriously.
Ok, yeah, that’s true. They’re banned anyway. I wonder why my friends and family say it though, even the more left-leaning ones
No one is left-leaning. You are or are not. Look past the lies people tell themselves so they can pretend to be decent.
Makes sense