"It's shoganai." How Elie Wiesel responded is similar to the Japanese concept of shoganai. Shogani roughly translates with almost a shrug of indifference as "It couldn't be helped."
Years ago, I asked Furuya Sensei about his family's experience during World War II and the internment camps. I asked him, "What was it like for them?" With a shrug he said, "It was shoganai" and then he didn't say another word about it.
Shoganai isn't a nihilist way of looking at life. It is a Japanese perspective similar to Elie Wiesel's after losing all of his money to Bernie Madoff. Shoganai enables the Japanese to maintain balance where the don't let the adversity of the situation change them one way or another.
Saying, "shogani" enables them to accept the circumstance and move on.