[jwalsh07]

But which laws should be codified into civic law?

That's what elections are about, whose morality is codified in law. Separating morality or the religious beliefs/non-beliefs of any legislator from the laws they promote is mythological nonsense.

[GunRunner]

So if the federal government wanted to regulate what types of hats women wear in church, it could in your opinion, as long as the people supported it with their vote.

Or to go even further, if the feds wanted to mandate all males be circumcised, they could? Any dictate from the Bible could be argued as a 'moral issue.'