I know that there are some comparative work out there. The stuff by Jospeh Campbell is one of them. But I also hear various pros and cons of his work by others including non Christian and non religious people.
I doubt there will ever be a single all encompassing book, or even encyclopedia set that could compare even a fraction of them in depth. May be easier to break them up into common Mesopotamian, Egyptian, Mesoamerican ( Iām not sure if there is a better term Christy would possibly be the best bet on that I think, Nordic and so on. Then maybe get more detailed on the various Mesopotamian faiths individually and compare them.
When it comes to the god of the Jews, Christians and Muslims ( the abrahamic god Yahweh) the first things I consider is that Yahweh was not given that name by parents, and he probably did not give himself that name ( or even the male gender ). I think itās highly probable that Yahweh used that name because itās a name that Abraham would have known. Abrahamās family may have even possibly worshipped this god before the revelation. Yahweh seems to be a Mesopotamian mountain god that was worshipped by Canaanites, Babylonians and later on Jews.
Since Iām comfortable with the idea that Yahweh used accommodation , by that he worked within the worldview and understanding of ancient Jewish people to reveal himself to them. This being took on the name Yahweh either by choice or itās the name the Jews decided for this power.
I feel that even the Bible itself hints at this.
1 Kings 20:28
New American Standard Bible
28 Then a man of God approached and spoke to the king of Israel, and said, āThis is what the Lord says: āSince the Arameans have said, āThe Lord is a god of mountains, but He is not a god of valleys,ā therefore I will hand over to you all this great multitude, and you shall know that I am the Lord.āā
All of that Iām fairly confident of.
The next part I am a bit less confident on. That is that I think the next possible conclusion given that would be what else did Yahweh accommodate about their beliefs concerning himself. Iām not to certain that scripture can really give in-depth certainties on Yahweh. Though I do believe completely that it gives us a decent character profile. But even that if sometimes awkward. Does he know everything? Did Moses actually change his mind? Was he compromising with Abraham over Lot and so on. What seems to be clear about his character is that he is Love and that his son, Jesus Christ , reflected Yahweh his father as the perfect example that a man can accomplish.
What Iām least confident on is did this same being accommodate other nations using the names of other gods and accommodated their various beliefs systems. Did he speak through ancient Hindus as Vishnu and inspire the vedas and so on. Iām not sure.
Since Iām not sure Iām not an ā all paths lead to Godā kind of guy. Iām also not a universalist. I ultimately decided to place my faith in Yahweh and Jesus and that he did inspire the texts we read as scripture and I would never exchange the bible for the vedas or teachings of Buddha or the Quran and I would never exchange Yahweh and Jesus for Krishna, Allah ( the way Muslims god ) or Odin.