Corbett, it is true that the founding fathers said they were founding a nation on christian principles. As your quotes show, they said so often. As leaders of a predominantly christian public, what else could they do? If they hoped to establish and govern a new nation, they had to reassure the public that the government would reflect christian principles.
But you are mistaking their words for their deeds. Look at the constitution and declaration of independence. They largely reflect not christian principles, but secular humanist ones. Democracy itself is a secular humanist creation, and it owes virtually nothing to christian dogma. Individual liberty, religious pluralism, self governance, freedom from domination by hereditary rulers, etc: these are not biblical concepts by any stretch of the imagination.
The founding fathers (at least the ones that prevailed in the debates that culminated in our constitution) were children of the Enlightenment, and the government they founded reflected that. The references in the founding documents to God, the Creator, etc., are probably good faith reflections of their spiritual beliefs. But when it came to creating a democratic government, they set their religious beliefs aside and relied almost exclusively on the principles of secular humanism.
This is why it is so scary to have fundamentalist christians aiming for political power. Almost any changes they would make to reflect biblical principles would erode the very bedrock of our secular humanist government.
Just to give one example: what if the christians succeed in banning stem cell research? They would be using biblical principles to destroy scientific inquiry. The fire-and-brimstone people might be happy about it, but the founding fathers (and the Enlightenment scholars who established modern science) would be appalled.
