I would understand why an atheist wouldn't like it too much as with I would probably reading something like The God Delusion. I'm probably going to read that book because there's always been a good amount of hype about it. In Keller's book, I think he attacks the New Age atheists more because of their offense toward religion rather than just a disbelief in God. I noticed in the book he used a lot of arguments against guys like Sam Harris and Christopher Hitchens and even with negative comments directed towards them from other atheists like philosopher Thomas Nagel. There was another atheist from a science magazine he used but I don't remember his name. Anyways, that's what I don't like about the book. He says he "politely refutes" what atheists have to say but rather I saw some not-so-good stuff in there. I like the second half a lot better. With that comment he made about everyone wanting to believe in God; though I believe in God I do agree with you on that. He did say though he knew it was a radical statement. As for what you said on evolution; I see what you mean on how morality could have come about. I honestly can't say anything too much about it though because I am not a biologist or anthropologist and I have not done much research on evolution. I was using what using Keller's research in his book said. Speaking of that, read what Alan Dershowitz from Harvard said about morality (obviously only if you want to though). I didn't put down all that he said and I think some of what he says somewhat relates to what you are saying. It is a brief paragraph but he mentioned how "behavior that is fitting". It was on page 156. I thought it was interesting but I'm not sure what you would think haha
1. I've also read the God Delusion, and found it a great read. However your comparison isn't quite accurate between the two books. I've read other "Why you should be a Christian" books, and found them to be a decent read. I could even say that for the second half of "The Reason for God". What made the first half a poor read, is that Timothy Keller spends most of that part of the book misrepresenting Atheistic positions, and then uses poor rationalization to refute his misrepresented claims. Some parts I actually laughed at because it was so bad. If he had put more research into understanding common Atheistic arguments, then wrote well thought out rebuttals, I would have very much enjoyed reading that even if I didn't agree with his conclusions. It is just tough to read something written by someone who clearly doesn't understand the people he's trying to address.
The second half he's writing more about Christianity, and Christian perspective, which he actually does know a lot about. That is why it's a lot more entertaining to read.
In the case of the God Delusion, Dawkins writes the entire book from an Atheistic perspective. He does not focus on one particular religion, instead focusing on the "God Hypothesis" as a whole. Arguments for God's Existence only take up one chapter in the entire book (Chapter 3, "Arguments for God's Existence"), and the only overtly Christian part of that chapter deals with St Thomas Aquinas's Proofs, which take up all of four pages.
Likewise, there is only one chapter that deals with arguments against God's existence (Chapter 4 "Why there almost certainly is no God"). The rest of the book deals with: The roots of religion, the roots of morality, explains why outspoken Atheists like him do what they do, how indoctrination happens and how to escape from it, and closes the book by making an argument that even the good parts that religion or religious belief provide to society are not needed.
So whereas Timothy Keller is at his best writing about Christianity, and fails horribly when trying to write an argument from an Atheistic perspective. Dawkins wisely stays away from trying to argue from a religious perspective, and instead writes about Theism and Atheism as a whole from an Atheistic view.
I'd certainly recommend reading it, even if you don't agree with Dawkins' conclusions, it's a very informative book nonetheless.
2. The quote you're bringing up is about how morals come from natural law. He then talks about Dershowitz's morality bit in that nature thrives on violence and predation (survival of the fittest). I would agree with him in some cases, however in others he is totally wrong.
Survival of the fittest does not mean you are the strongest predator, it means you are the most likely to survive in the climate in which you live. If being the strongest predator and most violent being was all that was required to survive, we would still have T-Rex's walking around the planet. Herbivores thrive without the use of violence, as does most plant life. The strongest, most well adapted members of the strongest, most well adapted species will live.
Sure, Carnivores typically commit some violent acts in order to eat, and in that case Dershowitz is correct. However, that's a minority of life as a whole, and therefore I don't agree with his conclusion that life thrives on violence and predation.