To me, a “good” genocide will clean out the “bad”. Even if the bad is apparently “innocent” as they claim, they must not forget the crimes they’ve committed are also the crimes others have as well. They should learn that the cleansing is to basically justify their existence being void, and their deeds to be rightfully punished. They need to know they must earn up to the consequences and live with the fact their lives mean nothing.
And there is more evil out in this world than good. However, the ones who are evil are just doing their job and the so called good ones are the criminals. They are not the victims, the evil ones are the victims because they were pushed to where they decided to lash out and hurt in retaliation. The hurt is understandable, because if you bottle it up long enough, you desire to take it out and show them no mercy.