I agree that the question is meaningless. That's what this whole digression has been about. People do morally good, bad and indifferent things for all sorts of reasons, including none, to themselves as well as others. The only reason the question comes up at all is to deliver by sleight of hand the implication that JC's posse must have known he was a real person.
At the age of five, Skagra decided emphatically that God did not exist. This revelation tends to make most people in the universe who have it react in one of two ways - with relief or with despair. Only Skagra responded to it by thinking, 'Wait a second. That means there's a situation vacant.'