Proving whether or not someone is supposed to be here requires due process. If they pick up the wrong person (because people have the same name, or look alike, or any reason) and deport them, then what? Are you going to accept that you or your family or friends get deported?
We shouldn't accept any false positives. And that's what due process is.
The last thing I worry about at night is my accidental deportation.
Due process is being abused as a process and term, to pretend we have to tie up the courts for years with some sort of nonsense debate between the government and lawyers about someone's legal status. It's just to stop American law and order from being enforced. People aren't putting up with this whole situation anymore and ultimately we're in control.
YOU would not even get a chance to prove your case when they deport you. And I use "you" here deliberately because everyone is at some point at the lowest rung of the ladder in a fascist regime.