I'm happy to help any way I can. I myself was once bothered that Judaism wasn't "original", until it dawned on me that the flood survivors were righteous people who knew God and surely some of their knowledge would be retained, even in clouded or piecemeal form.
There's even a Biblical explanation why those early cultures tended to be polytheistic: because exposure to multiple divine beings truly was the human experience back then, and with God's blessing, no less. But I suppose that's a different thread.
Well let me just say this. You do know that the flood didn't destroy all of the Nephilim/Giants/"Nimrods"/Angel-Human Hybrids/"Sons of God" right? So that makes sense that these early cultures were misled by other deities. Jesus even said, "As it was in the days of Noah, so shall it be when I return". Now, we have to understand what was going on in Noah's time. Yes it was sin left and right, but you know, if that were the case, Jesus would have came by now (you and I both know that) considering that sinning and God blaspheming is at an all time high.
Go read Genesis 6:1 and 6:4. THIS is what was going on in Noah's time. THIS is what Jesus was referring to when his return shall come to pass. This is exactly why God sent the flood. Not only because of wickedness and blaspheming of His holy name, but because he had to rid the human bloodline of any traces of sinfulness. He had to "start fresh" for Jesus to be born (the other human half/his mother) pure and perfect. That's why Herod wanted every male Jewish child killed. You see, Satan tried and tried again and again from Genesis up until nearly the latter years of B.C. to stop Jesus from coming. To our advantage and fortune, none of his plans worked out.
Whether you believe it or not, there is a "hybrid" bloodline still alive since the post-flood with Jesus even pointing this out about his future return regarding the same pattern of Noah's days. I'm not too big into conspiracies, but I believe God has showed me how this world works. If you'd like, I can start a WHOLE topic/thread on this. Now I consider this portion my expertise because I've been researching for over 6 years. The research I've compiled, alone, proves that Jesus needs to come back. Don't think I'm a nut, because as you can see, I take a logical approach at everything by research and connecting the dots before I conclude to my decision. (take this thread for example)
So yes, with that being said, I could see why and how these other cultures have distorted "God"s truth. The Nephilim's (sons of god/fallen angels) traces hadn't been entirely depleted. These are the entities that these pantheistic/pagan "religions" are centered around. (Aztec Quetzlcoatl/Mayan Kukulkan/Canaanite El/Egyptian Ra/Greek Zeus/Roman Jupiter/Hindi Indra)
You know, you can find similarities in all of these pagan Gods? That's what's crazy about this all. Also, the use of dragons and elephants in Egyptian/Mayan/Aztec/Chinese culture show the relativity among all groups. Yet, they are divided by waters and countless thousands of miles. These ancient cultures never came in contact with each other (example Maya: They had elephants in carvings. The elephant is NOT native to central/south america. It's nativity is Southeastern Asia (Pakistan/India) and Sub-Sahara Africa. Think about that. Same thing with dragons. The Indian/Pakistani/Mayan Zodiacs are unbelievably similar. Yet, no contact in ancient times.
But I'm getting off subject here i'll save that all for another topic.
Yes I believe these deities (fallen angels/hybrids) hated the true God so they taught simple man, after the flood, how to worship them instead of the one true God of the Israelites. Nimrod was in fact a Nephilim product (bible even uses the hebrew "Giant"/the account of Gilgamesh says he was 1/4 Human, 3/4 God. Bible says he was a mighty hunter before the Lord. Gilgamesh says he was hunting after "huwawa" to destroy him for sending the flood.). Just like Goliath who was a Canaanite (that practiced that polytheistic crap). After all, Satan tries to use the same "gameplan" that God uses. He's a knock off "wanna-be" that tries so hard to be like the Almighty.
PS: You know, it just dawned on me. God was furious with the Phillistines and wanted them to be eliminated. These same Phillistines knew who their "El" and "Elyon"s were, and that tells you right there that Jehovah had no association with them. The fact he helped David against those brutes proves he wanted revenge for their misguided/pagan worship of blaspheming him.