To the OP: You are a victim of bogus propaganda. "Separation of Church and State" is a term used by Jefferson to elaborate on the first amendment. From Jefferson's Letter to the Danbury Baptists:

"Believing with you that religion is a matter which lies solely between Man & his God, that he owes account to none other for his faith or his worship, that the legitimate powers of government reach actions only, & not opinions, I contemplate with sovereign reverence that act of the whole American people which declared that their legislature should "make no law respecting an establishment of religion, or prohibiting the free exercise thereof," thus building a wall of separation between Church & State."

Furthermore, Madison declared in an article to the Baptist Churches that: "Strongly guarded is the separation between religion and government in the Constitution of the United States"

The intentions of the founding fathers are clear, even if those exact words are not present in the constitution itself.