Explain how that verse cancels out God's unflinching condemnation of the abomination of plural marriage? In the Book of Mormon it is prohibited and called an abomination to the Lord, but then in the Doctrine and Covenants it is commanded. Indeed the practice is required in order to be truly saved.
Is your God schizophrenic?
It's the same way he condemns muder (thou shalt not kill) then turns around and tells Moses to wipe out all the men, women and children in a city. How about you go first. Go ahead and pontificate on the OT thou shalt not kill schizophrenia and I'll take a turn with the polygamy (which is also found in the Bible, ie Nathan.)