How Far Should We Go To Preserve Holocaust Relics?

The recent theft of and damage to the “Arbeit macht frei” sign at Auschwitz raises an unexpected question for curators, ethicists, and us observers: With the atrocities of the Holocaust already thoroughly documented, is it really worth it to expend scarce resources on preserving and repairing the memorabilia of the Nazi perpetrators? Better to just let it all decay and say, “good riddance”?