Jefferson said "endowed by their Creator (captial C) with unalienable rights". Nature can't endow rights.

Furthermore, this "Nature's Creator" entitles things to man (equal station to which the Laws of Nature and of Nature's God (Capital G) entitled them.

Even if you don't believe he's talking about the Judeo/Christian God, you must admit he's talking about a creator - a being who created nature and endows man with rights.

Besides, if Jefferson openly mocked religion, it's interesting that when he wrote for the Continental Congress (aka the Dec of Independance), that he included God. Perhaps this shows the fact that he never could have convinced the rest of the fathers (or the states) to vote for something that didn't include God.

It keeps coming back to the fact that religion is protected by the Consitution (approved by the Constitutional convention and the states) and idea of the seperation of church and state was never mentioned in any document which required any more vlidation than a postage stamp.