so, Christianity <— Judaism. Judaism <— Israelites. Israelites are generally understood as originating in the ancient Near East land of Levant and are rooted in Canaanite religion.
Therefore, Christian theology is rooted in Canaanite theology - which was originally polytheistic, although recognized a central deity known as ‘El’ alongside his feminine counterpart, Asherah.
When did this change? Division of United Kingdom of Israel into southern (Judah) and northern (Israel) states after ten northern tribes refused to accept the son of Solomon as their ruler due to - dun dun dun, taxes. Northern state falls to Assyrians; Southern state soon captured by Babylon - Jewish diaspora out the wazoo ensues. The patron deity of Israel, warrior god Yahweh, is all “yo Israel, times is hard, but if you declare me your one and only true supreme deity and forget the rest, I’ll save yr butts”. Israel’s like “YEAH YEAH FOR SURE PLS HELP”, and are relinquished from Babylonian captivity shortly thereafter. From then on, Israel declares Yahweh the creator of the Cosmos and everyone just starts calling him “adonai’ or “my Lord” in Hebrew.
But Yahweh was equated with ‘El’, who was formerly recognized as co-existing above a subset of other deities. If not for the Mesopotamian hegemony, there might have not been a need for monotheism in Judaism - or maybe I’m wrong and don’t understand anything.
BUT STILL, THIS CHANGES EVERYTHING IN MY BRAIN