Elosha: One of the Gods wanted to be more important than the others. And thus the war between the Gods began, and men left Kobol.
Six (who is listening with Baltar): Blasphemy. There has always been only one God.

The victor writes the history sort of thing? Good point.
At one point Gods were united 'as one' and now they are worshiped separately, except by Cylons who returned to the very beginning so to speak?

Cylons *want* divine intervention, live to be in harmony with it. Humans are *afraid* of it, are suspicious of divine intervention as a trick or story meant to mislead them.

Perhaps the above is part of the human reason - something left over from Fleeing the 'battle of the gods'. It's interesting thoughts to twirl around your finger for sure!