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"Do not think that I have come to abolish the Law or the Prophets; I have not come to abolish them but to fulfill them. I tell you the truth, until heaven and earth disappear, not the smallest letter, not the least stroke of a pen, will by any means disappear from the Law until everything is accomplished" (Matthew 5:17-18).
Sorry, but Jesus IS the god of the Old Testament, despite a few "kinder and gentler" pronouncements in the NT.