You all are missing the point completely. Romney is utterly confused as to what the Constitution states and what the founding fathers thought. They were Deists, hardly Christian.

James Madison:
"Ecclesiastical establishments tend to great ignorance and corruption, all of which facilitate the execution of mischievous projects."

Thomas Jefferson:
"History, I believe, furnishes no example of a priest-ridden people maintaining a free civil government. This marks the lowest grade of ignorance, of which their political as well as religious leaders will always avail themselves for their own purpose."

Benjamin Franklin:
"I cannot conceive otherwise than that He, the Infinite Father, expects or requires no worship or praise from us, but that He is even infinitely above it."
"As to Jesus of Nazareth, my Opinion of whom you particularly desire, I think the System of Morals and his Religion, as he left them to us, the best the World ever saw or is likely to see; but I apprehend it has received various corrupting Changes, and I have, with most the present Dissenters in England, some Doubts as to his Divinity"

John Adams:
"As I understand the Christian religion, it was, and is, a revelation. But how has it happened that millions of fables, tales, legends, have been blended with both Jewish and Christian revelation that have made them the most bloody religion that ever existed?"

Romney thinks religion is inseparable from freedom. He is wrong. Religious freedom is inseparable from freedom. It's ridiculous to say you can't be free without religion, just as it would be ridiculous to say you can't be free with it.