Religion is the duty which we owe to our Creator...no man's right is abridged by the institution of Civil Society and Religion is wholly exempt from its cognizance.... Because Religion be exempt from the authority of the Society at large, still less can it be subject to that of the Legislative Body.
--James Madison - Memorial and Remonstrance - 1785
When it passed the bill that recommended a belief in "one Nation under God", Congress foolishly and sinfully took cognizance of a disputed issue pertaining to the duty which we owe to our Creator. That isssue being whether there is or is not a God, and whether he is over us.
Leave the religion of the people as free as the air they breathe from government influence. Let each man decide for himself if God does actually exist and if God is over him.
If Christianity is the true religion it needs no help from the government. If not, let it wither and blow away.
When has Christ ever asked the government to help him promulgate his Gospel? When he stood before Pilate, Christ did not tell him that he was under the Savior's authority, or that the nation he ruled was under God. He said, "My Kingdom is not of the world..."
The Savior also told us to "Render unto Caesar the things which belong to Caesar, and unto God the things which belong to God"; thus clearly intimating that the temporal and eternal governments were not only distinct from each other, but that the distinction should be perpetual; and that the laws of Caesar, or of the governments of the nations, had to do with men as citizens of the temporal world; and that the things of God were not to be rendered to Caesar - but only unto God.
If you believe in God because the government made a law that told you to believe it, you are in a fast car on the Highway to Hell.