"If we did a good act merely from the love of God and a belief that it is pleasing to Him, whence arises the morality of the Atheist? It is idle to say, as some do, that no such thing exists. We have the same evidence of the fact as of most of those we act on, to wit: their own affirmations, and their reasonings in support of them. I have observed, indeed, generally, that while in Protestant countries the defections from the Platonic Christianity of the priests is to Deism, in Catholic countries they are to Atheism. Diderot, D'Alembert, D'Holbach, Condorcet, are known to have been among the most virtuous of men. Their virtue, then, must have had some other foundation than love of God."
-- Thomas Jefferson, letter to Thomas Law, June 13, 1814, using the term atheist to mean one who lacks a god belief, not one who is without morals, as was a common use of the term in Jefferson's day
"God is an essence that we know nothing of. Until this awful blasphemy is got rid of, there never will be any liberal science in the world."
-- John Adams, "this awful blashpemy" that he refers to is the myth of the Incarnation of Christ, from Ira D Cardiff, What Great Men Think of Religion
The atheist is living on "borrowed time," on the legacy of his ancestors, of whose insights and experiences over millennia he has no personal interest or sense of duty to understand, let alone defend, renew, or communicate to others.
That is, when it comes to the renewal of a good society from generation to generation he accepts no personal responsibility at all, which responsibility he in fact utterly repudiates from the get-go. In many cases, atheists believe they cannot advance their own causes unless and until the entire human past (religious, historical, and cultural) has been utterly laid waste, erased from human memory.
He is already a dead man walking — and trying to take down as many others of his own kind with him as he possibly can, to join him in a commonly shared eternal misery for all.
The atheist is a parasite, drawing its life from a culture that its entire being is devoted to draining the life out of. It is a case of protracted suicide, in slow motion. It destroys not only the atheist in the end, but any society in which the atheist voice/mind achieves cultural dominance.