There's a lot of ways this could branch off... Many of the original Christians believed the Old Testament god was/is the demiurge, and the New Testament god is the true God. IMO, the demiurge is really us. The book of Job is interesting in how it deals with the concept of Satan. "Satan" is a word, not a person, and it means adversary. Job asks God why he has become a Satan to him, and then God has a prideful hissy fit. That's clearly not the Father... So, it appears that the demiurge and "Satan" may be the same entity. Given how widespread beliefs like this were in the 300 years before the state church reared its beastly head out of the sea, and how utterly antithetical the state church was to Jesus' teachings - the mass murders it committed and the legalism and the idolatry and the twisting of everything into a justification for state violence - it seems quite likely that Christianity was hijacked by Jews, and they've been controlling it ever since.