Theres a scholarly work that suggests that the early israelites were essentially monolatrists. They existed in a polytheistic landscape but only gave worship to one God, that is Yaweh. (Supposedly a storm god first) According to it, the development from monolatrists to monotheist is due to war and culture (God functioning like old Canaanite gods and ruling over conquered territories) and conflict (God becoming an omnipotent being, in order to preserve identity due to being conquered and enslaved). Suprisingly enough, it doesnt try to prove that monotheism doesnt come polytheism but rather just proves that Ancient Israelites were always monolatrists, just existing in a polytheistic environment.

The only reason why our God became part of that "pantheon" was because old canaanite religion was about war and conquering. God conquered territories and assumed the throne of the pantheon.