This debate is not over symbolism. I have no argument with you there. This debate is over whether or not The Founding Fathers recognized God in the Constitution. I advise you to read the Federalist Papers link on that site I gave you to get a better understanding of what the Founders were trying to establish and what they actually thought.
I agree that the Bible contains much symbolism and "figure of speech." If you read my posts you will see I promote the symbolism in the Bible.
But to state that the Bible is completely symbolic is just as frivilous as those who profess that the Bible should be taken in complete literal terms.
The Bible is a combination of literal historical events and symbolic and archetypal meanings. There are astrological and astronomical symbols as well as "figures of speech" with literal under and overtones. But to say that the people or events did not take place is to also ignore the historical and archaeological records of Ancient Egypt which are the same records as the first half of the Bible. (the names have been changed, but it is the record of the same people)
History becomes legend, legend becomes myth, then all together forgotten. When they are rediscovered, they are oftentimes hard to believe. But that doesn't mean they did not take place. So Moses faced "glowed". Are you denying the possibility of a "supernatural" event? Then you deny all things in nature that "glow". His face "shone" because he was exposed to something "supernatural" (that is, that which is beyond our understanding of natural). Why is this so hard to believe for you?
Did meteors fall to the earth back then? Of course they did. Look at the story of Sodom and Gomorrah. Natural events did take place, albeit, with the help of a Supreme Advanced Being whom we call God. And the stories in the Bible are the records of these events. I don't believe the earth was created in a literal six days. In six ages, maybe, but not six days.
You are free as always to believe what you want.