Most history books written in the past 40 years have taken great pains to expurge the influence of Christianity on the founding fathers.
Few people today know that John Leland used to be considered one of the top 5 most important founding fathers. Why? He fought and won the Bill of Rights for the Constitution. Madison refused to insert a BoR until Baptist Preacher John Leland "forced" him to include it by running against him in Orange county and acquiring sufficient votes to win. lelalnd wrote a letter of 10 points on which to establish a Bill of Rights, the most important of which was freedom of religion, and promised to back out of the race and throw his votes to Madison if Madison promised to include the BoR in the Constitution.
A Baptist preacher is singularly most responsible for freedom of religion in the USA.
The notion that Christians would create a theocracy is simple nonsense. Protestants used to have 100% control over the US and they wrote the US Constitution and Bill of Rights.