Thankfully, for most people, such simplistic notions die at first contact with an actual real-life mass deportation campaign as they witness the wrecked homes and families they leave behind.

Most of these immigrants aren't islands unto themselves, they are here b/c they have ties here, or have even spent their lives here, and you're ripping them away from their families. Many of the dreamers they're trying to deport right now haven't lived in their "home" country since they were toddlers

That sort of thing leads sensible people to ask themselves, "what good is actually being done here?"

This is why immigration went from a winning issue to a losing issue with Republicans in the span of 2 years.