Under the right leadership many would self deport.
What the Times ignores in its background piece, is that the Eisenhower deportations removed well over a million, I believe over a million & 1/2. It also ignores the far greater deportations of ethnic Germans from Eastern Europe after World War II, as well as the transfers of large numbers of displaced persons, etc., from the West.
Many of the claimed legal problems could be resolved by a simple act of Congress, limiting the jurisdictions of Federal Courts--clearly within the powers granted to Congress in Article III.