What factors were invovled with the creation of the Church/State seperation?

Question

I know the founding fathers wanted to do away with faith-based governing due to the bloody history of the Church as the state. But what other factors were involved in creating the United States of America as a secular nation with secular leaders?

Answer 1

actually the early states had state churches

New England was congregationalist

New York Dutch Reformed. NYC used to be New Amsterdam

Pennsylvania Quaker

Rhode Island Baptists

Maryland Catholic, later Episcopalian

The South largely Episcopalian

The First Amendment "Establishment of Religion" Clause was only for national, federal office. Precisely because of the diversity of church states among the colonies. Some states had requirements that to hold a state office, you had to swear allegiance to the basic tenets and doctrines of Christianity.