Exactly why would you expect atheists to be democrats? Or is this just more bigotry? The association between Republicanism and Christianity (particularly fundamentalist Christianity) in the US is a comparatively modern phenomenon. Perhaps you don't realise that in many countries round the world it is Christianity and Socialism that march hand-in-hand.
And I recently heard that only 55 percent of Britons believe in God. Doesn't surprise me.
I wish I had more time to continue this thread and discuss issues not pertaining to my interpretation of the U.S.Consitution. Throw the following into any search engine of your choice and then please come back and revise your statement: "Christian abolitionists", "founding of the Republican party," "Abraham Lincoln," and "ending salvery in the U.S.".
You'll discover that Christians founded the Republican party. And back in those days, it was still acceptable to allow your Christian beliefs to influence your public policy descision making and voting.
Another poster earlier went on about Christianity supporting slavery or some such thing. The truth is, if it wasn't for Christians, slavery in America would not have been ended when it did.