There always seems to be some drive to argue that America is or isn’t a nation of religious faith: it isn’t. America is a nation of choice when it comes to God, and there’s good reason to be happy about that.
Many nations have an official religion, which means they have no religion at all, because their citizens aren’t operating out of faith but out of force. If people are coerced into worship, either by a government, a social group, or a parent, then there is no act of faith. If, say, the fundamental basis of Christianity is that a person must come on their own to Christ, it is impossible to ever do this when one is partially there because of outside pressure.
So the next time someone suggests that America is truly a Christian nation because the majority of people who believe in God also claim to accept portions of Christ’s teaching, inform them that we are a Christian nation only because so many people here do not really live within any religion at all. If everyone was a “real” Christian it would be instinct, or a mandate, but it wouldn’t be faith.