It is actually pretty ef'en simple. When an illegal comes into contact with law enforcement they get deported. No favoritism on whether they are a farm worker, roofer or gang banger. They are not legally here. Follow the law. Period.
My wife is pure blooded Italian, California born. Should the officer question her birthplace, ask for her papers, beyond a driver's license due to her appearance?
"Hey lady, you look like them damn 'wetbacks' we got around here. Show me your birth certificate." That there black hair you have is probable cause."
"Officer, I was born in California, like my father. He served in combat in WWII."
"Lady I have heard stories like that before. Don't give me no back talk. Just hand over your papers."