Huh, I always assumed that Jesus just used Assume Form, or whatever it's called, to make himself 12 ft tall.
In fact, my theory is that the whole 40k universe is just a failed Second Coming.
Actually, to stack things in my favor, Jesus would bring his Poker buddies with him. They are:
Buddha! (Fun fact: the real reason Buddha's a pacifist is because whenever he bunches someone, a 254 megaton atomic explosion occurs. On their faces.)
Gandhi! (His opponents lose any moral high grounds they once had.)
And Yog Sothoth! (Yog-Sothoth knows the gate. Yog-Sothoth is the gate. Yog-Sothoth is the key and guardian of the gate. Past, present, future, all are one in Yog-Sothoth. He knows where the Old Ones broke through of old, and where They shall break through again. He knows where They have trod earth's fields, and where They still tread them, and why no one can behold Them as They tread.)
Your move. (Assume they have moved off of the Amish aligned plain)