Keep in mind Von Neumann was ethnically Jewish and the fact that the Jews he would have grown up with went from respected citizens to extermination in a matter

Keep in mind Von Neumann was ethnically Jewish and the fact that the Jews he would have grown up with went from respected citizens to extermination in a matter of years might have affected him. I have no idea if that is the case but the fatalist, apocalyptic attitude you reference is the kind of thing you occasionally hear from Jews profoundly warped by the atrocities of that era.