Love is a decision not a feeling; true love often involves sacrifice; you can love your enemy and your annoying family members – looking at someone as perfect has almost nothing to do with love – it is choosing to do good to or for another that is love – willing the good/best for another through thought and deed
Thus, bringing someone evil to justice can be very loving – to stop them on their downward swing into hell and give them a chance to convert and turn to God, their Creator and source. There are many testimonials that violent criminals who turned to God while in jail and prayed for early release were able to leave jail early as new men/women (and I am not talking about those who con the system to get out early).