Pushing the limits of artistic representation: Inciting memory and discourse - the only way to go?

How can art help us "remember the future"? Works are here cited because they are visceral or offbeat in the context of the Holocaust. They do not attempt to 'sanctify' the event. All produce screams. They raise unpleasant images of the past or mysterious deconstructions that demand the viewer address the subject in a deeper way. This art commits viewers to engaging in an ongoing debate about genocidal events. How much horror can an audience accept on canvas?