Nietzsche claimed God dead. He justified it by reasoning that thought and culture had effectively reached a point where they could no longer rest on the unproven ideas, beliefs and assumptions of religion. I think Nietzsche was a bit short sighted both in his vision and timescales at which the concept of God develops. Then and there.
The biggest problem, Salah thought, was how one went about killing a god. You could burn its scriptures, wipe out its worshipers, kill its avatars, but that would only ever delay it. Eventually it would come back, whispering, and the whole cycle would begin again. It could wait forever.