My relatives got this book for Christmas and were delighted to start reading it. My thought was "I've heard all the arguments for atheism since I was in high school. What could he possibly say that was new?"
So he goes with religion is evil and religious believers can't explain what created God. It's about the same argument I hear from any atheist.
I guess his next book will be on why it's important to wash your hands. Maybe he'll come up with "it reduces the spread of germs" and be praised for his groundbreaking thought.
Dawkins has a difficult time facing up to the dual facts that (1) the twentieth century was an experiment in secularism; and (2) the result was secular evil, an evil that, if anything, was more spectacularly virulent than that which came before.