The actual original stated history near the start of the religion is that Adam and Eve weren't the "first people" to exist, just the first Jewish/Christian people created by God. Since it was common belief and understanding at the time that other gods also existed from the other religions and created their own peoples.

Judaism was monotheistic only in regards to following a single god, but it fully recognized other existences in a much larger pantheon.

It was only later that Jewish and Christian scholars denigrated the existence of other gods to be "demons" worshipped by pagans and thus lower than the "one true god" and all that nonsense.

If I understand it right, the Jewish God came from a pantheon, and didn’t just respect other pantheons. Like it was equivalent to a group of people who worshipped the Roman gods and then said “Yeahhh, but we’re going to pick Vulcan as our main guy.”

Proto Jewdism was highly influenced by Egyptian religion. Many themes and plots being pulled from there. It wasn’t until these proto-Jews spent time around Zoroastrianism that the religion really took its modern form.

There is evidence of proto-Jews worshiping other gods but there is no evidence of worship of more than one God though.

Yahweh was originally part of a pantheon of gods. Specifically he was a Warrior-Storm god. Early Canaanite who became the Jews worshiped multiple gods. youtu.be/mdKst8zeh-U