> sent his kid in the form of a human.

Jesus is God. Don't ask me how to explain it from a theological standpoint but from my understanding: God decided he wanted to better understand the NPCs in his HumanSim(TM) game so he straps on a VR headset, enters the game via a virgin birth hack, gets killed, then rage quit. Hasn't been seen since so likely started a new game on some other planet.