Final answer:
Elie Wiesel's experience as a Jew in the concentration camps greatly influenced his viewpoint in the excerpt by giving him firsthand knowledge of the atrocities committed during the Holocaust.
Step-by-step explanation:
Elie Wiesel's experience as a Jew in the concentration camps greatly influenced his viewpoint in the excerpt. As a survivor of the Holocaust, Wiesel witnessed and endured unimaginable atrocities, including the dehumanization, torture, and mass murder of fellow Jews. This firsthand experience shaped his perspective on the horrors of the concentration camps and the importance of bearing witness to those events.