You are mixed up here Al. The sole reason for separation of church and state was to prevent a church from gaining complete authority over government. The main reason for this and the fear of this was to escape the church of England who held control of Americans from across the sea. The church of England controlled everything before independence was won.<quoted text>All of the founding fathers were deeply religious men. Of the 56 men who signed the Declaration of Independence, nearly half (24) held seminary or Bible school degrees. Most were Deists with a few being Christian. The Declaration of Independence gives us important insight into the opinions of the Founding Fathers. Thomas Jefferson wrote that the power of the government is derived from the governed. Up until that time, it was claimed that kings ruled nations by the authority of God. The Declaration was a big departure from the idea that the power to rule over other people comes from God. They understood the pros and cons of religious influence in government and didn't want to have government stifle or control churches or vice versa.
So by decree it was written into the constitution that there could be no state appointed religion or religion appointed state.
Some foolish Americans want to return to a theocracy , but it is because they do not understand the reasons why we wrote the possibility out.