How can some people be basically good and actively try to do harm?

There are cases in history where many people have agreed that a certain person was evil. Through our agreement, we reinforce the view that there are indeed evil people, but it is important to realize that a person and his or her actions are always in relationship to relative causes and conditions and that no person is inherently bad. Source: How can some people be basically good and actively try to do harm? – Lion’s Roar