Really?
"The Government of the United States of America is not, in any sense, founded on the Christian religion" -John Adams, 1797
"History, I believe, furnishes no example of a priest-ridden people maintaining a free civil government" -Thomas Jefferson, 1813
"Of all the systems of religion that ever were invented, there is no more derogatory to the Almighty, more unedifying to man, more repugnant to reason, and more contradictory to itself than this thing called Christianity" -Thomas Paine, 1795
"An alliance or coalition between Government and religion can not be too carefully guarded against" -James Madison, 1822
"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, the best the world ever saw or is likely to see, BUT IT WAS RECEIVED VARIOUS CORRUPT CHANGES, AND I HAVE, WITH MOST OF THE PRESENT DISSENTERS OF ENGLAND, SOME DOUBTS AS TO HIS DIVINITY"
And yeah, America was first founded as an English speaking nation, since everyone here was
English. But, over time the U.S. became a nation of immigrants from all over the world. There's a reason we don't have an official language.