And those Protestants, wisely, did not set up religious litmus tests for citizenship or to hold public office.
And they did not restrict "religion" to Christian denominations.
They did one better; they created and controlled public education:
Source.The first official public school system was created in Boston in 1818 based upon a growing reform movement. The reformers argued for public funding and oversight by offering an emotional plea that poor parents couldn’t afford to send their children to private schools, not to mention their obvious disagreement with the private schools on the issue of religious doctrine. Despite the fact that charity provided for education of the poor and despite a survey by the “Boston School Committee” which proved that 96 percent of the city’s children attended school, and despite no compulsory attendance laws, the government school system was placed upon the country’s shoulders.
During the 1830s and 40s, public schooling found a champion in Horace Mann. A Calvinist at birth, he rejected it for Unitarianism, which at the time attempted to purge sectarian and divisive doctrine. He graduated from Brown University and became an attorney in 1825. He eventually became president of the state senate and focused his time there in the movement to concentrate control of education in the hands of the state.
I'll see if I can track down the religious test aspect of the founding of the 1st Amendment.
Your turn. See my previous. Slacker.