In “Outlawing Genocide Denial: The Dilemmas of Official Historical Truth” (University of Utah Press) historian and political scientist Guenter Lewy scrutinizes the practice of criminalizing the expression of unpopular, even odious historical interpretations, exemplified by genocide denial. Holocaust denial can be viewed as another form of hatred against the Jews and preventing it can be understood as a form of warding off hate speech. Germany has made it a crime punishable by law. Other European countries have similar laws.