HAHAHAHA!! Yeah, like the abolute monarch Louis XVI "raised his hand" against those radicals who were trying to establish a republic in rebellion against his brother Christian king.
My point is that they WEREN'T atheists. It is, of course, problematic that the Founders were declared against the Divine Right of kings - but on the other hand, English Christianity and French Christianity were not one and the same - there MANY issues between the two faiths.
The long rivalry between the nations probably weighed in the balance - but it still took Benjamin Franklin's thumb on the scales to tip them our way.