No, I am well aware of the history and content of biblical texts.You act like you assume the Bible has always been...
You mean once the Yahweh had been adopted and claimed as their own within Judaism, which was polytheistic in its origins.The oldest known inscription of the Yahweh dates to 840 BC, on the Mesha Stele. It bears the earliest certain extra-biblical reference to the Israelite god Yahweh.
You are ignoring the mentions of the Yahweh within the Canaanite pantheon of deities worshiped, and seen, for instance in Ugaritic texts, ranging in dates from around 1450-1200 BCE. That is the best documented time period within the Ugarit culture, too.
You are aware that Canaanite people/culture is where the Hebrew people/culture originated from, aren't you?