I think you're confusing natural disasters with man-made ones. Which is which? In what other books of the Bible are these issues addressed? Job? Ecclesiastes? The New Testament? If you're going to postulate that Noah may have been insane, then that at least requires him to be real. Are you saying you believe the story of Noah's Ark to have been based on an actual event or not? And more importantly, when was Genesis written, by whom, and for what audience? What does it say about the culture who wrote it? What are the metaphysical and spiritual implications of it? How do these compare with other religions and mythologies? Why are these studied even by non-believers? What are the various ways in which the religious interpret it and why is it important to them?
The issues involving the Bible aren't black and white. Either way, though, it doesn't matter. By refusing to read the Bible and analysing it from a neutral perspective, you're limiting your statements to the collective appropriation of metal cliches, and believe me, almost none of them have had anything insightful to say about religion.
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"And lo, the beast looked upon the face of beauty. And beauty stayed his hand. And from that day on, he was as one dead."