Reviewed in this essay: The Prague Cemetery: A Novel by Umberto Eco, translated from the Italian by Richard Dixon. Houghton Mifflin Harcourt, 2011. Umberto Eco’s The Prague Cemetery is a novel about hatred, and about why people love to believe conspiracy theories, which confirm their worst fears about groups they fear or resent. “In some of your essays you’ve written [that]… we live in an...