I have wondered about this question myself. The God of Israel is not the same God that is taught by Christ. In Elaine Pagels book "The Gnostic Gospels" she explains how the early Gnostic Christians thought of what God was:
"What this secret tradition reveals is that the one whom most Christians naively worship as creator, God, and Father is, in reality, only the image of the true God. According to Valentinus, what Clement and Ignatius mistakenly ascribe to God actually applies only to the creator. Valentinus, following Plato, uses the Greek term for "creator" (demiurgos), suggesting that he is a lesser divine being who serves as the instrument of the higher powers. It is not God, he explains, but the demiurge who reigns as king and lord, who acts as a military commander, who gives the law and judges those who violate it - in short he is the "God of Israel."
"Though the initiation Valentinus offers, the candidate learns to reject the creator's authority and all his demands as foolishness. What Gnostics know is that the creator makes false claims to power (" I am God, and there is no other") that derive from his own ignorance. Achieving gnosis involves coming to recognize the true source of divine power - namely, "the depth" of all being. Whoever has come to know that source simultaneously comes to know himself and discovers his spiritual origin: he has come to know his true Father and Mother."
"Whoever comes to this gnosis - this insight - is ready to receive the secret sacrament called the redemption (apolytrosis; literally, "release"). Before gaining gnosis, the candidate worshiped the demiurge, mistaking him for their true God: now, through the sacrament of redemption, the candidate indicates that he has been released from the demiurge's power. In this ritual he addresses the demiurge, declaring his independence, serving notice that he no longer belongs to the demiurge's sphere of authority and judgement, but to what transcends it:
I am son from the Father - the Father who is preexistent....I derive being from Him who is preexistent, and I come again to my own place whence I came forth."
Will
"I am quite sure now that often, very often, in matters concerning religion and politics a man's reasoning powers are not above the monkey's."
Mark Twain