We might as well get this out of the way first, to preempt any swooning by the milquetoast wing of the Democratic Party: Yes, abolishing ICE would leave immigration statutes on the books, and those laws should be enforced. Anyone proposing to abolish ICE must also propose replacing it with a vastly improved successor organization.
But Democratic grandees have to get it through their heads that ICE is too politicized, too bloated and too corrupt to be reformed into anything like a legitimate agency of government operating under the rule of law. One might as well hope that the Ku Klux Klan could be reformed into a charitable social organization. ICE must be dismantled and another, different agency built over its bulldozed ruins.