that the whole project is at serious and maybe fatal risk if trump is imprisoned or loses in the fall and that conservatives on the court have a duty to try to prevent that any way they can, through the most motivated reasoning they can conjure.
i'm not really being snarky; i don't know if roberts thinks about it in terms quite as stark as that, but that's because everyone's the hero of their own story and most people try to find any way they can to rationalize and justify the choices they make, i assume this goes 100x for judges
SCOTUS may embody the highest degree of sophistication and erudition in self deception, if any of those six are still denying to themselves that they are in the tank.