Had Jesus merely been a teacher, then there's nothing for the world to worry about. If he commissioned us to be the guardians of one interesting philosophical perspective among many, then Christianity is just another option at the buffet of ideas. The worst-case scenario is that there may be a little intellectual difference of opinion. But if he’s more, if he is who he says he is, from the very being of God with all attendant authority, that’s a different matter altogether. That’s when he becomes a threat to every established human institution: political, economic, educational, religious.