Those who say "this nation was founded to be Christian" are, indeed, dead wrong. However, it -was- founded with Chritsian values at its core. I mean actual Christian values, now, as in What Jesus Said, not what the various peoples have done with it. This is obvious to anyone who reads both the Declaration of Independance and the Constitution with a clear understanding of Christ's core values.
We are -not- a Christian State, but the values that inform our laws are very Christian indeed. I, for one, am glad this is so, or else it would be pure capitalistic greed, and I'd predict that we would be in a totalitarian state worse than Russia.
I wish I had time to dive into this one more deeply, but you guys are seriously tearing up the page here...maybe I'll get some free time later for more.