what's funky about the "gospel of judas" is that it indicates that there was supra-moral or "beyond good and evil" stage or movement within christianity, in which the greatest sins are conflated with the greatest moral heroism. there are such movements and moments in many religions. an interesting analogy would be tantrism, which prescribes moral transgression, including various sexual activities (but at its most extreme: murder, even), as means to enlightenment.