It simply means not to hate anyone. One must know that the person who is doing such heinous deeds is hurting himself and the Divine Presence within him most. So when one stops him from such an act by whatever means, it is actually an act for the good of all, even if it implies a strong action, including bringing him to justice. This is not retribution but an act of compassion, giving him a chance to change, or if one is called upon to kill him, as in police or military action, it helps prevent his soul from engaging in further dark deeds.
Affectionately,
Alok Da
