Its a rip off from Sumerian texts:
An is supreme god has two sons Enlil and Enki. Enlil is god of the "hoe", agriculture, earth. Enki is god and creator of man, animals, god of wisdom, medicine, knowledge, great teacher, healer... Sumerian equating to "Jehovah" and "Satan" is not such a big leap, especially when you read the Sumerian creation stories and "fall". By the way Enlil was an asshole who wanted to destroy man, Enki wanted to give men freedom and not slavery...
Ask yourself this: How many people did Satan kill in the Bible, how about Jehovah? Why did Jehovah "curse the ground" and make it hard for Adam to grow crops? Why did Moses erect a copper serpent around a pole and have the Israelites look at it to be saved (serpent wrapped around a pole is the emblem for the God Enki in Sumerian texts)?
How many people to Jehovah resurrect in the Bible? How about Jesus? What were the attributes of Jesus? Hmmm, great teacher, healer, etc...