Wow... what a load of BULLshyt.
Let me expound on this a bit. It seems to me that a pretty important biblical principle is the notion that God is the only god, and Jesus is his only begotten son. And the single worst thing you could do, according to Christian dogma, is to speak against that god, or believe in different gods.
If the founders knew this, and biblical principles were ALL they knew, then why would the first idea they used to govern this "Christian based" new country be ideas like "people are free to blaspheme God and country", and "the state cannot assume authority over one's religious beliefs"?
It seems obvious to me that "Christian principles" wasn't the ONLY source our founders got ideas from. It if was, it seems reasonable to assume that the first thing they made law wouldn't be in direct conflict with God's first commandment.