For at least two and a half thousand years, virtually all educated people believed that knowledge was the savior of humanity. Even Maimonides wrote in his “Guide for the Perplexed” that once all of humankind had knowledge, the world would be at peace. Then came the 20th century. The most educated nation in world history—a land to which all other nations looked for science, psychology, culture, philosophy, reason, and ethics—applied its knowledge to commit crimes against humanity that no barbarian could have imagined. “Does calling for the genocide of the Jews violate your institution’s code of conduct concerning bullying and...