If imaginary, funny. If real, terrifying. This includes the actions of people who think he's real.
Personal hypothesis: Jesus, Buddha and other religious figures who practiced radical pacifism and love didn't actually believe in God or the supernatural, but were using such teachings as allegories for the effect people have on the world around them. For example, reincarnation and karma could be allegories about how what we do ripples throughout the world and into the future, usually in ways we can't even imagine.