So, why doesn't Scripture uniquely endorse a specific denomination ?

[Wyrd of Gawd]

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Then how come he had to destroy the world with a flood after pronouncing his work "good" just a few chapters before.  Sounds like a massive fuck up to me.

It's almost as if the asshole didn't know what was going to happen which strongly argues against "omniscience."

Clown.

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Aye, dude's well pleased with his creation until chapter six then for, er... reasons, he doesn’t go in to much detail, he decides to drown the fucking lot of them. Apparently he was displeased with the amount of violence in the world, so to put an end to the violence he kills just about every living thing on the planet.
Makes perfect sense.

That's exactly what happens during most wars.  We have a lot of examples in American history regarding the wars between the whites and the Indians.  

The Noah flood story is simply a war story.  It's probably about the Egyptian invasion of the Levant.