Orr gives it right back to Dennett.

2) Dennett asks me to identify some allegedly serious thinkers on religion. I named two in my review but am happy to name them again: William James and Ludwig Wittgenstein. I chose these two as both wrote after Darwin and had training in science or engineering; both were, then, presumably in a position to recognize the challenges posed to religion by science. One may or may not find convincing James’s attempt to discern whether religion is possible in an age of science or Wittgenstein’s interpretation of religious practice. Indeed I myself have reservations about their claims. But I find it shocking that someone writing at book-length on religion would fail to discuss, or even mention, their views or those of their intellectual equals. What, for instance, does Dawkins think of Wittgenstein’s picture of religion? Does he reject Wittgenstein’s idea that believers sometimes use language in a way that differs from (and is incommensurable with) how we normally use language? Would he even count Wittgensteinian-style religion as religion? And, if not, is it still child abuse? Is it evil? (For more on Dawkins and Wittgenstein, and from a bona fide philosopher, see Simon Blackburn’s superb review of Dawkins’s earlier book, A Devil’s Chaplain (The New Republic, December 1, 2003).)

The bottom line is that Dawkins, by ducking serious thought on religion, made things far too easy for himself. One result is that the naïve reader of The God Delusion can walk away from the book wholly unaware that serious post-Darwinian thinkers have wondered if religion is really so simple as Dawkins pretends.