Read the last line below from the text I have quoted from the Articles of Association, to Britian, in 1774. Notice the phrase Protestant colonies.
"We, his majesty's most loyal subjects, the delegates of the several colonies of New Hampshire, Massachusetts Bay, Rhode Island, Connecticut, New York, New Jersey, Pennsylvania, the three lower counties of New Castle, Kent and Sussex, on Delaware, Maryland, Virginia, North Carolina, and South Carolina, deputed to represent them in a continental Congress, held in the city of Philadelphia, on the 5th day of September, 1774, avowing our allegiance to his majesty, our affection and regard for our fellow subjects in Great Britain and elsewhere, affected with the deepest anxiety, and most alarming apprehensions, at those grievances and distresses, with which his Majesty's American subjects are oppressed; and having taken under our most serious deliberation, the state of the whole continent, find, that the present unhappy situation of our affairs is occasioned by a ruinous system of colony administration, adopted by the British ministry about the year 1763, evidently calculated for enslaving these colonies, and, with them, the British empire. In prosecution of which system, various acts of parliament have been passed, for raising a revenue in America, for depriving the American subjects, in many instances, of the constitutional trial by jury, exposing their lives to danger, by directing a new and illegal trial beyond the seas, for crimes alleged to have been committed in America: and in prosecution of the same system, several late, cruel, and oppressive acts have been passed, respecting the town of Boston and the Massachusetts Bay, and also an act for extending the province of Quebec, so as to border on the western frontiers of these colonies, establishing an arbitrary government therein, and discouraging the settlement of British subjects in that wide extended country; thus, by the influence of civil principles and ancient prejudices, to dispose the inhabitants to act with hostility against the free Protestant colonies, whenever a wicked ministry shall choose so to direct them."
Anglican in Virginia, Puritan and Pilgrim in New England, Quaker in Pennsylvania, dissenters in Rhode Island, Dutch Reformed in New York. All thinking the others were really not Christians.
And the fact is that the modern day American fundamentalists and evangelicals would have been expelled as heretics from those colonies. The Puritans would have executed them if they returned after banishment.
DS, no one cares about weird Christians then OR now.
We are secular nation.
And yet all the above WERE Christians who were to find protection under the Constitution which was written and signed by Christians or those who were sympathetic to the Christian religion in general. But the fact that you've observed that Virginia was primarily Anglican; New England was primarily Puritan/Pilgrim; New York was primarily Dutch Reformed (Protestant); and Pennsylvania was primarily Quaker literally proves the point of the OP: that America began as a Christian nation. Thanks for your agreement.
The point was somehow that nation was a nation of unified Christianity, which it certainly wasn't. Thanks for pointing that out. They all came, other than the Quakers, to dominate and exclude if necessary other sects.