Well, I certainly think that the opening passage of TGO is meant deliberately made to parallel something of Christian mythos, moving from a state of ignorance to knowledge, fulfillment to hunger, silence to words. It kind of throws the Garden of Eden for a loop though, with the "and it was as Death" part. Implying that the primordial state was not paradise, but rather more something of a torpor or purgatory. The Book of Fane implies that it was a word the fractured the God. In other words, it was Man's (or Nonman's) fault.
While I know that we have a hard time believing everything Scott says, I think his implication that it wasn't Men or Nonmen who fractured the God should be taken at face-value. I see no real reason why he would lie about that, as I doubt it is a plot device in any way. No, I think that The Book of Fane is simply wrong, in the way it is wont to be, since it has reason to preach why the Solitary God would be at war with the 100.
Rather, it would seem that the God really did fracture itself. The question is, why? What if The God was not The God of Gods though? In other words, the Solitary God that was fractured was not Zero, but rather One. And in this way, realized that the path to the Absolute, to Zero, would be in subtraction. So it shed parts until only Zero remained?