Unbelievable!

In contrast to your post, here are a few other quotes from our founding fathers...
Patrick Henry:
“It cannot be emphasized too clearly and too often that this nation was founded, not by religionists, but by Christians; not on religion, but on the gospel of Jesus Christ. For this very reason, peoples of other faiths have been afforded asylum, prosperity, and freedom of worship here.” [May 1765 Speech to the House of Burgesses]
Thomas Jefferson:
“God who gave us life gave us liberty. And can the liberties of a nation be thought secure when we have removed their only firm basis, a conviction in the minds of the people that these liberties are a gift from God? That they are not to be violated but with His wrath? Indeed I tremble for my country when I reflect that God is just, and that His justice cannot sleep forever.” (excerpts are inscribed on the walls of the Jefferson Memorial in the nations capital) [Source: Merrill . D. Peterson, ed., Jefferson Writings, (New York: Literary Classics of the United States, Inc., 1984), Vol. IV, p. 289. From Jefferson’s Notes on the State of Virginia, Query XVIII, 1781.]
James Madison:
“We have staked the whole future of American civilization, not upon the power of government, far from it. We’ve staked the future of all our political institutions upon our capacity…to sustain ourselves according to the Ten Commandments of God.” [1778 to the General Assembly of the State of Virginia]
The three branches of the U.S. Government: Judicial, Legislative, Executive
At the Constitutional Convention of 1787, James Madison proposed the plan to divide the central government into three branches. He discovered this model of government from the Perfect Governor, as he read Isaiah 33:22;
“For the LORD is our judge,
the LORD is our lawgiver,
the LORD is our king;
He will save us.”
Jedediah Morse:
"To the kindly influence of Christianity we owe that degree of civil freedom, and political and social happiness which mankind now enjoys. . . . Whenever the pillars of Christianity shall be overthrown, our present republican forms of government, and all blessings which flow from them, must fall with them."
Thomas Paine:
“ It has been the error of the schools to teach astronomy, and all the other sciences, and subjects of natural philosophy, as accomplishments only; whereas they should be taught theologically, or with reference to the Being who is the author of them: for all the principles of science are of divine origin. Man cannot make, or invent, or contrive principles: he can only discover them; and he ought to look through the discovery to the Author.”
“ The evil that has resulted from the error of the schools, in teaching natural philosophy as an accomplishment only, has been that of generating in the pupils a species of atheism. Instead of looking through the works of creation to the Creator himself, they stop short, and employ the knowledge they acquire to create doubts of his existence. They labour with studied ingenuity to ascribe every thing they behold to innate properties of matter, and jump over all the rest by saying, that matter is eternal.” “The Existence of God--1810”
John Adams:
“ The general principles upon which the Fathers achieved independence were the general principals of Christianity… I will avow that I believed and now believe that those general principles of Christianity are as eternal and immutable as the existence and attributes of God.”
“[July 4th] ought to be commemorated as the day of deliverance by solemn acts of devotion to God Almighty.”
–John Adams in a letter written to Abigail on the day the Declaration was approved by Congress
John Quincy Adams:
“Why is it that, next to the birthday of the Savior of the world, your most joyous and most venerated festival returns on this day [the Fourth of July]?" “Is it not that, in the chain of human events, the birthday of the nation is indissolubly linked with the birthday of the Savior? That it forms a leading event in the progress of the Gospel dispensation? Is it not that the Declaration of Independence first organized the social compact on the foundation of the Redeemer's mission upon earth? That it laid the cornerstone of human government upon the first precepts of Christianity"?
--1837, at the age of 69, when he delivered a Fourth of July speech at Newburyport, Massachusetts.
Nelly Custis-Lewis (Washington’s adopted daughter):
Is it necessary that any one should [ask], “Did General Washington avow himself to be a believer in Christianity?" As well may we question his patriotism, his heroic devotion to his country. His mottos were, "Deeds, not Words"; and, "For God and my Country."
http://www.eadshome.com/QuotesoftheFounders.htm
http://www.loc.gov/exhibits/religion/rel06.html