"I reject your premise. In fact, I think that ascribing our rights to a creator weakens them, as not everyone will agree on the nature and preferences of the creator. Moreover, people are more fickle with their beliefs than with their contracts."
Your post is based on the false assumption that our beliefs about God actually control who he is. If in fact God is accurately described in the Bible, it matters not one whit what people actually believe about him.
If lots of people refuse to believe the theory of gravity, it doesn't mean gravity will cease to exist.
Your right about it weakening our rights however, for it takes away our right to be god ourselves. But then, the bible warns of the outcome of that thinking repeatedly.
We weren't talking of "who God is"; we were talking of how people behave.
The poster was indicating that a lack of religion would cause bad behavior. If that were the case, you'd think that scientists would be more religious than the U.S. prison population. Despite their widespread atheism, however, very few of them end up behind bars.