He copied from the OT, e.g. food restrictions, usurping Abraham etc, he debases Christ and makes himself equal to him. The knowledge of Christ and all the rest had existed for centuries in the OT, NT. He had significant contact with both Christians and Jews. The people he primarily wanted to conquer were Christians, how better to make his religion a little more palatable to them than include Christ in it ? No, he had no interest in complying with Judaism or Christianity. Those faiths put restrictions on what he was interested in, violent conquest, misogyny, various sexual perversions, and he would have to play by the rules he didn't like, so he made up his own, putting himself as the mouthpiece for his god, the ultimate authority of right and wrong.