Based on your comment, I would guess that means you're not familiar with and or not lived in venues where rampant immigration, legal and illegal has occurred.
We have a lot of English and Greek immigrants and some Japanese. Our Mexican population is 2.5%. No idea how many are legal vs illegal. I think most of them work or own local Mexican restaurants with a small handful scattered elsewhere. So they aren’t the issue here they are in other areas. They are pretty bad in Richmond though, which is about an hour away.