Well, in a recent piece for The Guardian, theological ethicist Stanley Hauerwas slams the very idea that Americans are more religious (much less Christian) than people in countries like Britain. Instead, Hauerwas contends that the "religion" most of us Americans espouse is that of autonomously choosing who or what constitutes "god," and then using what that "god" purportedly gives us (a nation that guarantees freedom of choice, for instance) to justify our freedom to choose the "god" of our choosing. In the end, all of this comes down to utilitarian religion and self-fulfillment.
Here's part of what Hauerwas writes:
Even if more people go to church in America, I think the US is a much more secular country than Britain. In Britain, when someone says they do not believe in God, they stop going to church. In the US, many who may have doubts about Christian orthodoxy may continue to go to church. They do so because they assume that a vague god vaguely prayed to is the god that is needed to support family and nation.
Americans do not have to believe in God, because they believe that it is a good thing simply to believe: all they need is a general belief in belief. That is why we have never been able to produce interesting atheists in the US. The god most Americans say they believe in is not interesting enough to deny, because it is only the god that has given them a country that ensures that they have the right to choose to believe in the god of their choosing. Accordingly, the only kind of atheism that counts in the US is that which calls into question the proposition that everyone has a right to life, liberty, and happiness.
America is the exemplification of what I call the project of modernity. That project is the attempt to produce a people that believes it should have no story except the story it chose when it had no story. That is what Americans mean by freedom.
The problem with that story is its central paradox: you did not choose the story that you should have no story except the story you chose when you had no story. Americans, however, are unable to acknowledge that they have been fated to be "free", which makes them all the more adamant that they have a right to choose the god that underwrites their "freedom."
A people so constituted will ask questions such as "Why does a good god let bad things happen to good people?" It is as if the Psalms never existed. The story that you should have no story except the story you chose when you had no story produces a people who say: "I believe that Jesus is Lord – but that is just my personal opinion."
Read it all.