Biden should give an executive order to lock this guy up for treason.
When people complain about that, point to the SCOTUS decision that the president can do whatever the fuck he wants without legal repercussions.
If any of the people who complain even vaguely hint at violence in reaction to this, give an order to lock them up for treason, too.
Keep this cycle going until the last grunt has understood that this type of behavior will not stand.
Once all the people willing to call for violence are locked up, use the same reasoning to disband the current SCOTUS and replace it with something that is not an embarrassment for a modern democracy, with a strong recommendation to immediately renounce the ruling that made all of that legal.
By the time the dust has settled Biden will be too old to be persecuted for any of that anyway.
I know none of this will happen, writing it out just as a happy little fantasy.