It was the evangelical denominations in the colonial and post-Revolutionary times who greatly feared the establishment of official state religion(s) in America, based on the then-dominance of large mainstream Protestant denominations, particularly the Episcopalian power centers in New England.

Funny to think that we owe the guarantee of "Congress shall make no law respecting an establishment of religion" to the very Baptists, Congregationalists, etc., who are now trying to establish their religion as having state-like authority to dictate to everyone regardless of their faith.

How the proud are humbled, especially those who would make a show of their religious superiority.

reflectively,
Bright