Why does elie wiesel believe indifference is the most dangerous emotion?

In his speech “The Perils of Indifference”, Wiesel voices out that he believes indifference to even be more dangerous than anger and hatred. The two aforementioned emotions can push a person to action, whereas indifference shows a lack of compassion by not even acknowledging the injustice happening.  Indifference, while not actively causing harm, will always be an advantage to evil and thus is dangerous in itself.

in an absolute  monarchy, the  monarchrules as an autocrat, with absolutepower  over the state and government — for example, the right to rule by decree, promulgate laws, and impose punishments. the  monarch isnominally sovereign but the electorate, through their legislature, exercise political sovereignty.

answer; overt behavior;