The fact that he was deported is not the issue. The issue is where he was deported to.
Wrong. The only crime he committed was unlawful entry. He had permission to remain. He has met all the conditions. His status was changed because he was misidentified as a member of a terrorist gang. He was illegally deported without due process.
He is married, working, and supporting three special needs children, all who are American citizens. He poses no threat and has extended family who are citizens. There is no reason to deport him. He should probably be granted resident status.
If they want to deport him, bring him back and relitigate his status.