A strong belief in evolution & the concept of 'survival of the fittest' was sufficient justification for the Nazi extermination of Jews. Evolution sporned the 'science' of eugenics which actively encourages the removal of the weak and genetically inferior from the human race. Dawkins can clearly see that an evolutionary inspired morality equals a society without compassion, without concern for those less fortunate, without tolerance for those perceived as different or inferior in some way. Evolution lessens the value of human life and sees man as just another animal who is a bit smarter than the rest, but still an animal.