How do atheists who believe the founding fathers werent Christian respond to this?

George Washington 1st U.S. President While we are zealously performing the duties of good citizens and
soldiers, we certainly ought not to be inattentive to the higher duties of
religion. To the distinguished character of Patriot, it should be our
highest glory to add the more distinguished character of Christian. John Adams 2nd U.S. President and Signer of the Declaration of Independence Suppose a nation in some distant Region should take the Bible for
their only law Book, and every member should regulate his conduct by
the precepts there exhibited! Every member would be obliged in
conscience, to temperance, frugality, and industry; to justice, kindness,
and charity towards his fellow men; and to piety, love, and reverence
toward Almighty God ... What a Eutopia, what a Paradise would this region be. The general principles on which the fathers achieved independence
were the general principles of Christianity. I will avow that I then
believed, and now believe, that those general principles of Christianity
are as eternal and immutable as the existence and attributes of God. The second day of July, 1776, will be the most memorable epoch in
the history of America. I am apt to believe that it will be celebrated by
succeeding generations as the great anniversary Festival. It ought to
be commemorated, as the Day of Deliverance, by solemn acts of
devotion to God Almighty. It ought to be solemnized with pomp and
parade, with shows, games, sports, guns, bells, bonfires and illuminations, from one end of this continent to the other, from this time
forward forever. Thomas Jefferson 3rd U.S. President, Drafter and Signer of the Declaration of
Independence 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 of the Gift
of 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; that His justice
cannot sleep forever; That a revolution of the wheel of fortune, a change of situation, is among possible events; that it may become
probable by Supernatural influence! The Almighty has no attribute
which can take side with us in that event. I am a real Christian – that is to say, a disciple of the doctrines of Jesus Christ. John Hancock 1st Signer of the Declaration of Independence Resistance to tyranny becomes the Christian and social duty of each
individual. ... Continue steadfast and, with a proper sense of your
dependence on God, nobly defend those rights which heaven gave,
and no man ought to take from us. Benjamin Franklin Signer of the Declaration of Independence and Unites States
Constitution Here is my Creed. I believe in one God, the Creator of the Universe.
That He governs it by His Providence. That He ought to be
worshipped. That the most acceptable service we render to him is in doing good to
his other children. That the soul of man is immortal, and will be treated
with justice in another life respecting its conduct in this. These I take to
be the fundamental points in all sound religion, and I regard them as
you do in whatever sect I meet with them. As to Jesus of Nazareth, my opinion of whom you particularly desire, I
think the system of morals and his religion, as he left them to us, is the
best the world ever saw, or is likely to see; But I apprehend it has received various corrupting changes, and I
have, with most of the present dissenters in England, some doubts as
to his divinity; though it is a question I do not dogmatize upon, having
never studied it, and think it needless to busy myself with it now, when
I expect soon an opportunity of knowing the truth with less trouble. I
see no harm, however, in its being believed, if that belief has the good consequence, as probably it has, of making his doctrines more
respected and more observed; especially as I do not perceive, that the
Supreme takes it amiss, by distinguishing the unbelievers in his
government of the world with any peculiar marks of his displeasure.--The Writings of Washington, pp. 342-343. --Diary and Autobiography of John Adams, Vol. III, p. 9. --Adams wrote this on June 28, 1813, in a letter to Thomas Jefferson. --Adams wrote this in a letter to his wife, Abigail, on July 3, 1776. --Notes on the State of Virginia, Query XVIII, p. 237. --The Writings of Thomas Jefferson, p. 385. --History of the United States of America, Vol. II, p. 229. --Benjamin Franklin wrote this in a letter to Ezra Stiles, President of
Yale University on March