There are many things that I'd like to believe, but I don't because they are mere idealist views. I can read a wonderfully emotionally-charged novel, with a good plot, three-dimensional central characters and a remarkable ending. But when I put that book down, I can come back to harsh reality without believing the novel, however ideal, really took place. Thinking that something is ugly, or distasteful in no way means that it is true or false. Present evidence or at least a rational argument for why my position is wrong.
I am familiar with the Dawkins idea. It is just that in this context it becomes plain what an utter abomination it is.
Calling something an "abomination" just to win an arguement is how I used to argue when I was a Jehovah's Witness. It is not an argument which holds any water for me now. Now, for me to believe something, it has to be well thought-out, well argued and have at least some evidence, preferably physical or scientific, to back it up. If you have nothing reasonable, intelligent or rational to say, please refrain from saying it. It just bogs us down in pointless skirmishes.
Objector: "Well but look! Here is an example of a genuine act of altruism!"
The Dawkins: "Errrm. That's just where evolution fucked up."
There are many examples of where evolution has... shall we say, "messed up". But the thing you misunderstand is that the idea of evolution "messing up" is inherently a fallacy. Evolution does not have a plan or agenda, it does not have an ideal final outcome, it is not a conscious force, deliberately seeking to do better and better.
Natural selection and mutations can only work with what they've got.
For example, (1) the mitochondria in our cells are said to have originally been invading bacteria. They have separate DNA from us humans and nothing to do with our genetic code. Over some time, we have developed a symbiotic relationship, to the point where we can no longer survive without each other.
(2) In an ideal human body we would not have a vestigial appendix. Creationists may say that it actually does serve some kind of function, and that may well be. However no matter what it's supposed function, the fact of the matter is that the human body would be better without it.
(3) Penguins use their wings originally meant to fly, to navigate underwater. Evolution has again "messed up" and made do with what it had.
(4) Whales have to perodically come up for air because they cannot breathe underwater, because they are mammals. Evolution has again worked with what it has to produce a functioning animal. Its not ideal, but it is what it is.
Dawkins' proposition is that human ethics come from such a process. Using a feature which was originaly used for a different purpose in our ancestors, for a new purpose. (Or sometimes for no purpose at all in the case of the appendix).