There are any number of things I could criticize about the book, and it really does seem like one that wants lots of specific rebuttals. But I simply don't have that kind of time. Overall, let me say that Dawkins takes a remarkably narrow view of religion, and—I think—of human nature itself. I think he's also a bit too quick to overlook the shortcomings of rationality, but that's not as critical to my dislike of the book. It's worth reading, in order to engage with this important conversation (and because he does make a few good points). But the fundamental flaw underlying it makes it a much less worthy book than another author might have produced from roughly the same standpoint.