The Second Amendment is key to the entire Bill of Rights. If the Court voided it and confiscation began, the government would have to void the provisions against unreasonable search and seizure, right to assembly, prohibition of self incrimination, the right to a speedy trial and free speech just to get the job done. It would usher in a authoritarian government as ruthless as any a country of our size has seen.
There would be a lot of people who would see opportunity in such a world so we can’t just assume it won’t happen. The Presidency is critically important this time around as is keeping the Senate.
Bingo!