Obviously he never read the Constitution, something he swore to uphold and defend, as per Article VI: 3 The Senators and Representatives before mentioned, and the Members of the several State Legislatures, and all executive and judicial Officers, both of the United States and of the several States, shall be bound by Oath or Affirmation, to support this Constitution; but no religious Test shall ever be required as a Qualification to any Office or public Trust under the United States. And a few facts. One, separation of church and state is not mentioned anywhere in the Constitution. What the Founding Fathers did not want was a State Religion or mixing political hierarchy and religious hierarchy. Two, only some of the Founding Fathers were Deists. Many were Anglican, some were the equivalent of Evangelical Christians, some were Catholic and one (John Adams) was Unitarian. Three, we were not founded as a Christian nation, as none of the three documents most important to the founding of this nation, the Declaration of Independence, the Articles of Confederation or the Constitution mentions such a thing.