Peter: do you think that means dr.Dawkins thinks rape is morally acceptable? If so, then you have just answered the question with 'yes', and you should probably be incarcerated and/or castrated.
***
Simple Jack: "The atheist philosophy has no objective justification for any act being more/less moral than any other act".
What you can NOT do is *justify* your morals. The atheist philosophy has no objective justification for any act being more/less moral than any other act (as Peter already pointed out above).