I never made any claim for Judaism prohibiting polygamy. I was comparing Christianity and Islam.
Jesus and Paul quote: “Therefore a man shall leave his father and his mother and hold fast to his wife, and they shall become one flesh” (Genesis 2:24). That verse is cited by Jesus and Paul as decisive in the meaning of marriage today. And the meaning focuses especially on this leaving parents and cleaving to one wife and becoming one flesh with her. That one flesh reality is profoundly compromised by polygamy.
