Why do the ritors ask for Justice?

[KevinM1]

While the avenues for his message have multiplied, the themes of Barton’s work are the same today as they were in 1995. Barton peddles the proposition that America is a Christian nation, legally and historically. He asserts that the principle of church-state separation, while not in the Constitution, has systematically been used to rule religion out of the public arena, particularly the public school system. His presentation has just enough ring of truth to make him credible to many people. His work, however, is laced with exaggerations, half-truths and misstatements of fact.

~ Baptist Joint Committee for Religious Liberty: here (emphasis mine)

Anyone who actually thinks the US is a Christian nation simply hasn't done any study on the history of that era.  The political realities of the time (fairly large Jewish population, tension between Catholics and Protestants, history teaching them that religion and governance is a terrible combination, many of the Founders straddling the line between deist and Christian, etc.) precluded it.  They didn't want to risk the fledgling nation they paid for with blood and sacrifice over religious conflict.