Don't get it twisted, I don't put any credence in the story whatsoever. Mythology or war allegory, it's got enough plot holes to sink an ark. The best that can be said of it is that it makes more sense than the plot of Evan Almighty. But then, most things do.
At the age of five, Skagra decided emphatically that God did not exist. This revelation tends to make most people in the universe who have it react in one of two ways - with relief or with despair. Only Skagra responded to it by thinking, 'Wait a second. That means there's a situation vacant.'