A trip through a major Holocaust museum will tell you most of what you need to know about the mindset of the fiends who murdered millions in the middle of the last century. Poster-size images of death-camp inmates – all staring blankly – attest to the monstrous worldview of the prisoners’ tormentors. What, though, really explains the Nazi capacity for murder? How could “regular people” slaughter children? What possessed – pun intended – Hitler’s willing executioners to butcher women and old men? I think Jerry Bergman has figured it out In a new book, “Hitler and the Nazi Darwinian Worldview,”...