In a polytheistic worldview, there is no final arbitrator of truth. The deities fight amongst each other. The deities stole wives from each other. The deities can be killed. They spitefully contradict and blaspheme one another. They are subject to defeat and virtually powerless by themselves. Thus, truth and morals are rendered subjective. Peace becomes nonexistent. Chaos abounds fully. Of what practical application is polytheism?
In contrast, the God of the Judeo-Christian framework exists as one in three separate, divine persons. God is all-knowing, all-powerful, and all-present. He is eternal. He is self-sufficient. He is love, and enjoys fellowship. He is righteous. He is consistent with Himself. Trinitarian monotheism is the most rational expression of monotheism. No mere man could have invented a doctrine as sophisticated, yet so profound, as that of the trinity.
The so-called divine entities of polytheistic religions are defective and so have proven themselves to be nothing but idols. The Holy Scriptures plainly tell us that there is only one true God (Exodus 20:1-3; Isaiah 43:10-11). He is the Creator of heaven and earth (Genesis 1:1). Logical deductions used to argue for the existence of God such as degrees of perfection, our orderly universe, and objective morals are supportive of monotheism. Further, it is from the Judeo-Christian worldview that people derive the objective nature of truth and logic.