Every law presupposes a law-maker or law-giver.
But every ancient law-maker imposed his will to power and superiority as the will of God. Weaving God in was his imaginative metaphor and myth to make his discourse credible, by concealing his own will to power and superiority.
In his very profession or proclamation of some law as a divine will or revelation for his followers, he was both effectively and poetically concealing his own will to power.
Thus the law-maker made God into the mask behind which to hide and secure his own will to power and superiority. This makes every god-invoking law an implicitly concealed lie. Every law is a lie, which masquerades as the truth of God.
But the nature of truth is to expose the lie or secret concealed behind the law. In exposing God as the lie behind the law, the gospel of John demythologized the Law of Moses. If it exceeded the synoptic gospels in taking such a stand, it was because it was moved by the spirit of its time, which was one of total opposition and enmity between the two ethnicities.