My favorite dead relatives, however, are the ones who were kicked out of the Colony of Massachusetts for being the wrong kind of Puritan, which means, as long as we're clearing up matters of religious misconception, pure in matters of doctrine, not without sin. They'd come to the colonies, as many had, because they couldn't practice their brand of religion in a land where the state was the head of the church. What they found (or perhaps helped to found, as the records aren't very clear) was a colony where the church was the head of the state, just as many would like the situation to be today.
There's no doubt that some of the colonies were founded as Christian settlements. Does that mean the U.S. was founded as a Christian nation? Find out at Quiche Moraine.