First of all, there is and never has been, and until the end of time as we know it, there will never be a Christian nation. Additionally, Nuke, what you said in that last statement is a bit skewed. First of all, it's not simply religion running the show, it's people running the show. People who have made said religion about things to do for the sake of doing them, rather than for the love of a most high God. Many of the later crusades, this was especially true. A corrupt pope, for example.
There's absolutely nothing wrong with doing things as a result of a love of God. It's when you lose sight of God, and are simply doing things blindly, that the problems begin.