Digging deeper into our religious roots

I've received a lot of personal response to my last post on whether the US is a Christian Nation (it's not), most of it positive, and even the negative has been civil, which I appreciate.  Most of those that disagree go back further in the nation's history to the Puritan immigrants who landed in New England.  My understanding of the nature of the Puritan settlements doesn't change my opinion.  I can agree that the Puritans were a religious people, but not necessarily Christian in nature.
We've all heard that the Puritans fled England because "religious persecution" but that persecution was instigated by the Puritans' persecution of anyone who wasn't of their mindset.  Yes, the Puritans were fundamentalists who had decided that everyone but them was destined for Hell.  Even today that ends to piss people off.  
Of course, it is also not true that the Puritans fled England.  It was more like they were invited to leave.  there was a great deal of rejoicing in English government when they left because they no long had to spend resources protecting them from the angry mobs that wanted to do them in.  The Puritans just wore out any goodwill that might have existed for them in their home country.  So they left... for Holland.
Yep, the Puritans actually took up residence in the land of wooden shoes and windmills for a decade where they continued to push their legalistic beliefs on the Dutch.  Their new countrymen didn't really complain much (the Dutch are a quiet bunch) because they were an extremely tolerant society.  And that really ticked off the Puritans.  After 11 years, they decided that the influence of tolerance was infecting their children.  They needed to go elsewhere, and quick.  But they couldn't go back the England... especially because England didn't want them.  
So with the help of both Dutch and English government officials, the Mayflower became made available for the Dutch Puritans and those that had remained in England to take them to the New World.
What is really strange about this is that one of the leaders of this group, Roger Williams, preached against what he called  the "enforced unformity of religion" in the Church of England, and when they established themselves in the American colonies, they did exactly the same thing.  
When I look at our society today, I can see that tradition in spades.  Everyone is absolutely sure that there way is the right way.  We have entire broadcast networks dedicated to one view of the world over another.  If you want to say that America is a religious nation, then I can completely agree with you.  It's hard to find someone who isn't religious about something, even if it's being religious against religion.  That is what is both very right and very wrong about America.
But if you want this nation to be considered Christian, then you are going to have to abandon a strong focus on whether something is a sin or if something is sinful.  For this nation to become Christian we are going to have to agree that Jesus Christ died to eliminate sin past, present and future.  It's not about who is wrong or right.  It's about who God loves.  And He loves us all, no matter what.  He paid too high a price to have that fact adulterated.