What does Wiesel consider to be the worst response to human suffering?

lack of concern for those who are suffering

refusal to accept that such suffering exists

pity felt for the victims of suffering

violent hate felt towards those who inflict suffering

Wiesel considers the worst response to human suffering to be a lack of concern for those who are suffering. He believes that indifference is a dangerous attitude that can lead to further atrocities and allows suffering to continue unchecked.