Use the tip i gave to Ge64. (one of the above posts)

just dodge jesus until he runs out of ammo, and then he will be pretty much floating there doing nothing. DON'T kill him, cause u want him to float there doing nothing, cause if he is there, another one won't spawn.

So with a usuless out of ammo jesus flying around being useless, all u need to do is kill the zombies that come at u. u can kill them with 1 shot of shotgun to head, so it should be very easy. I didn't think they mean for u not to kill him, as it kinda makes the game too easy.