"If the Danish prime minister started confessing her belief in a god she'd be laughed out of the room."
As an 18 year old American, active in American politics (I've done minor campaigning, father is a US History teacher), this is utterly strange. A politician that was not some denomination of Christianity would be, most likely, completely unable to win a Presidential election. And that's even if they were a religion the Christian majority feels close to, such as Jewish. If they were Muslim, or so help them atheist, they would stand no chance at the White House.
I recently had a friend of 6 years from the UK come and visit for two weeks, and we had a number of discussions on cultural differences. When he mentioned that the majority of people in the UK were not religious, I was dumbfounded. I (foolishly) thought it was everywhere as it is here. In my community at least, to openly question the existence of a God is a social faux pas. I have an interesting perspective having been on both sides of the coin, but in the end it scares me as much as it scares you. The concept of God abounds in our Pledge of Allegiance, in our graduation ceremonies, in our political speeches--it is almost universally accepted and above question.