Everybody seems to want to fight and can't see that most are arguing the same points, just stating them differently.
The original settlers did not have entirely pure motives. They wanted to be able to establish THEIR religion here without persecution from the Church of England and they did establish their own little theocracy being no more tolerant of other beliefs than was the Monarchy they left.
The Founders wanted no monarchy and no theocracy. They envisioned a nation in which the people would have their rights recognized, protected, and defended and then be free to govern themselves free of tyranny of dictator, monarch, feudal lord, totalitarianism, or authoritarian church. Our Constitution was brilliant in accomplishing that.
But if people are to be free, they must be free to have the sort of society they wish short of violating the unalienable rights of others. Therefore the Puritan and other little theocracies that existed at the time were allowed to exist because the people wanted them. That was the kind of society they wanted. And once the people came to realize that the theocracy was not the kind of society they wanted, they were just as free to dissolve them. Which they did within a single generation.
The Constitution, that gave such religious freedom to the Puritans, prohibited the Puritans from insisting that the Quakers or Roman Catholics or Calvinists in other colonies adopt Puritan rules and convictions.
It has been interesting to watch a people allowed to govern themselves to produce the most free, most innovative, most inventive, most productive, most prosperous nation the world had ever known.
We are now piece by piece chipping away at the foundations of that Constitutional principle to our detriment. I think too few Americans even understand it any more. And to me that is tragic.