Answer:
his feeling of disbelief that these atrocities could occur
Step-by-step explanation:
In the book titled "Night" written by Elie Wiesel what finally causes Wiesel's resistance to breaking down in the Nazi German concentration camps at Auschwitz and Buchenwald between 1944 to 1945 was his "his feeling of disbelief that these atrocities could occur." Particularly, given that the period was the 20th century and many people or the world at large are quiet about it.