The only way to condemn one natural instinct, and condone another natural instinct, is to have a standard which transcends natural instincts. Dawkins’ worldview cannot provide that. Thus, as he shuffles through the mixed-bag of human tendencies, he arbitrarily puts some of them in the bucket marked “moral” and arbitrarily puts others in the bucket marked “evil”, when his worldview demands he needs to simply take the whole bag.
Chapter 2 of Dawkins book is inflammatory and offensive, but in his defense he warned his readers at the tail end of the previous chapter. “The God of the Old Testament is arguably the most unpleasant character in all fiction: jealous and proud of it; a petty, unjust, unforgiving control-freak; a vindictive, bloodthirsty ethnic cleanser; […]