Often, people seek vengeance and revenge for the injustices and wrongs committed against them by others, yet they desire mercy when they wrong others. If you are not willing to show mercy, then you should not expect mercy in your life (Lev 19:18, Matt 6:14-15, Col 3:13). True justice is given out by God (Deut 32:35, Prov 20:22, Prov 24:29), so believers should only respond in love, their enemies can be humbled into shame for how they treated others and repent. If they refuse, then God will condemn them. In the meantime, we must love our enemies (Prov 25:21-22, Matt 5:43-48, Luke 6:27-28, Rom 12:14-21).