I am sympathetic to these thoughts by Terry Eagleton:
The distinction between Hitchens or Dawkins and those like myself comes down in the end to one between liberal humanism and tragic humanism. There are those who hold that if we can only shake off a poisonous legacy of myth and superstition, we can be free. Such a hope in my own view is itself a myth, though a generous-spirited one. Tragic humanism shares liberal humanism’s vision of the free flourishing of humanity, but holds that attaining it is possible only by confronting the very worst. The only affirmation of humanity ultimately worth having is one that, like the disillusioned post-Restoration Milton, seriously wonders whether humanity is worth saving in the first place, and understands Swift’s king of Brobdingnag with his vision of the human species as an odious race of vermin. Tragic humanism, whether in its socialist, Christian, or psychoanalytic varieties, holds that only by a process of self-dispossession and radical remaking can humanity come into its own. There are no guarantees that such a transfigured future will ever be born. But it might arrive a little earlier if liberal dogmatists, doctrinaire flag-wavers for Progress, and Islamophobic intellectuals got out of its way.
Richard Dawkins seems really and truly to believe that if he could just make religion disappear we would have a “paradise on earth”. This is too frivolous for words. Eagleton by contrast is at least trying to confront the darkness humans always and everywhere seem to harbor within them. Anything short of that is just wishful thinking.