The untrained response to robbers and thugs and to those who otherwise err is outrage and retribution. Wrongdoers need to be rightly understood to form the correct response to their behavior.
The appropriate response to bad deeds is a pity for the perpetrators since they have adopted unsound beliefs and are deprived of the most valuable human capacity: the ability to differentiate between what’s truly good and bad for them. Their original moral intuitions have been distorted, so they have no chance at inner security.
Whenever someone does something foolish, pity him rather than yield to hatred and anger as so many do.
We are only enraged at the foolish because we make idols of those things which such people take from us.
The Art of Living
By Epictetus, Translated by Sharon Lebell