A phenomenon of taking the state centralized cult and "democratizing it" across the whole population. When it stood and functioned, the first temple was not monotheistic, the text itself attests this. The monotheistic vision of the first temple is idealistic and anachronistic.

This assumes the first temple was built by Solomon to be monotheistic. The Tanakh itself records that it was polytheistic and housed icons of other deities for the majority of the time it stood. I think it would be more accurate to say that monotheism as we now see it in Judaism is very much

YHWH doesn't appear in any Canaanite or Ugaritic sources as a younger brother of Baal, or arguably at all. His being a son of El is based on the alt version of Deut 32, but this isnt super clear. Gods in ANE religions have complex relationships. Eg - Dionysus is Son of Zeus, but also "Young Zeus."

Not necessarily. Milkom =/= Moloch. "Moloch" in the Tanakh likely reflects a specific rite of sacrifice. Not a deity or entity. Moloch is not mentioned in any Canaanite or Ugaritic sources, except the conflation with Milkom. They are not equivalent.