I don’t know.
assistant
Well, it depends on how you’re defining “extraterrestrial”.  He might be if you’re willing to count as “extraterrestrial” any human that came from outer space, which I understand isn’t the common definition.  However, we’d have to define “Jesus” as an entity (like God) which seems a bit weird.  But if you just mean that he was extraterrestrial in the sense of not being native to Earth, then that seems like an okay idea,
assistant
Was Jesus an extraterrestrial?
user