EdenOne..What you described pretty well sums up the classic position. One of the slight refinements proposed are that worshippers of YH/YHWH might have from earliest times been regarded as somewhat exclusivist, as was apparently the case among metallurgists in neighboring cultures. This might explain the trend toward monolatry as well as the profuse copper associations. As the cult was introduced to a wider audience through commerce, naturally local forms evolved. Hence in time "Yahweh of Samaria" and "Yahweh of Teman" and Qos became separate yet homologous identities.
Amzallag goes so far as to link the metallurgist deity to those of other bronze age cultures such as Egypt and Elam to explain passages like (Jer. 49.37-39) which promises to restore Elam (whose chief god Napir was a metallurgist) after a period of punishment and (Isa. 19.22 and Ezek. 29.13-14) that says the same about Egypt (specifically Noph which was founded by metal crafter Ptah). IOW in the minds of some Yahwists, these people all worshipped the same god known by different names.(Napir and Ptah) and therefore Yahweh had vested interests in the fate of those people as well.
No doubt the work of syncretism and substitution resulted in conflation of Yahweh with indigenous Canaanite deities like El and Baal, but the supposition that Yahweh was regarded a son of El in earliest times is being challenged. Often Deut 32 is cited as support for this, however according to the most recent proposals, Deut 32 is a preYahwist model of El (as Father of the gods) being utilized to account for the Yahwist's monolatrous worship of an imported deity. He is "slipped in" as one of the gods under El and assigned to Israel. It is a snapshot in time, a very short time, when he was explained as one of the gods of the Canaanite pantheon of El, but at the same time the only designated deity of Israel. Yahweh's absence from Ugarit deity lists belies this however. It was an artificial attempt to domesticate Yahweh. In reality, his existence requires we look outside Canaan, and the evidence points south.
llubrevlis2000....Well, you have a point that the demons and angels of later (second temple) Judaism were in fact the gods of the earlier polytheistic times of Canaan. This is a conscious result of monotheistic reforms. The second temple keepers of the Yahwist cult recast the one-time rival gods into subordinate spirits, angels (messengers) and demons (ironically 'daimon' Greek for lesser deity).
It is also ironic that the reverse began to happen in late antiquity with 'arch'angels becoming more godlike nearly returning to a polytheism of sorts. Corollary to this was the hypostatic conceptions of a 'son of God", 'son of Man' and 'Wisdom' character that substantially equated God with a second figure that eventuated in Christianity.