You are making the assumption that without christianity they would lack the values and morals to write the constitution? Remember most of them were deists and freemasons and using the bible as a source of inspiration when conjuring the constitution would seem pretty alien to them.
No, no, I'm saying that the very forward-looking ideas about the individual and the role of institutions that the FF based their though on are heavily influenced by Christian though. You have to understand that Christian "philosophy" has been around 2,000 years, and churchmen have ALWAYS been amongst the intellectual elite in every country.
Like I said, phrases like "all men are created equal" is a very "Christian" line, the only difference being that in Christian though it is usually followed by "in the eyes of the lord". A lot of what we think is "secular" is nothing more than recycled Christian thought. I must admit that I am an atheist and I am in no way speaking from a pro-Christian stance.
I see what you're saying but to attribute the healthy morals and principals in the constitution almost solely to christianity is giving it too much credit.
Not the healthy morals, I'd say part of the basis of our morals was stolen from Christian beliefs. I mean, this is nothing new, and it certainly wasn't new back in the XVIII century. Those who wrote it might want you to think that it was morally innovative, but the truth is that the Greeks were talking about the individual 400-500 years BC. These basic principles of philosophy eventually somehow morphed into what then became Christianity and eventually spread all over Europe, morphing even further and acquiring the local belief base. Needless to say it eventually made it into America, which was founded on a somewhat radicalized version of Christianity but, because of religious persecution in England, valued the "freedom" to do as you like (like pray, marry or plow the land) over most things. It was this freedom "seed" that eventually blossomed in the US Constitution. But make no mistake, all of this has an origin, nothing new, been discussed for many years.
You know this already, so I apologize for rambling on and on.