First of all, Ethan Allen, while a founding father of Vermont, is not considered a founding father of the country.

In addition, Thomas Jefferson, was not an atheist and this is recorded in à letters he wrote to John Adams.

George Washington was a very religious man, privately expressed. His nephew reported visiting him morning and night to find him reading the Bible, and on his knees praying. I remember visiting à church in Alexandria, Va., where he worshipped regularly. The records say he seldom missed a Sunday.

All of the founding fathers believed in God which was my opening statement.