Even if that were true, what part of that problem is solved by creating an untrained, trigger-happy national police force, imposing them on skeptical local jurisdictions, and declaring them to be above the law? Local jurisdictions do not enforce immigration laws because the Constitution says they don't have to. That's the rule of law. What part of the modern ICE force is rule of law? It's pure thuggery and intimidation. "Just do what we say and no one will get hurt" is pretty far from the rule of law.