Note that the mention of god in the Declaration of Independence was to convince the church of England, which ruled us and England at the time, that their belief in god logically required England to concede the existence of our "unalienable right" to rule ourselves. Using one's own words/beliefs to make a point is a common method of debate/argument.
Recently in defense of religious displays on public property, one obnoxiously claimed that the Bill of Rights protects "Freedom of Religion, not Freedom from Religion". Obviously, this person has never read the First Amendment, which states FIRST that "Congress shall make no law respecting an establishment of religion" (freedom from religion) BEFORE "or prohibiting the free exercise thereof" (freedom of religion).
Is God Real?
Is the Bible the Word of God?
Does Prayer Work?
Does Religion Belong in Government
Is the Whole World in God's Hands?
What if God Doesn't Exist?