To an extent, sin can be thought of as the disorder of loyalties. We sin when we act contrary to a vow or obligation that a loyalty places on us. For instance, when we sin against God, we choose to break loyalty with Him by ignoring His commands in order to satisfy another person, to whom the bond of loyalty should not be as strong. That person may either be ourselves or another. We can sin against people in the same way, too. For example, if a man joins his friends in publicly scorning his wife, he has chosen their approval over his loyalty to her as wife. Looking at it from the other angle then, sanctification is learning how to honor our loyalties.
This is helpful to think through when dealing with enemies. The Lord commands us to love our enemies, and pray for those who curse us. That means that we have a loyalty to our enemies that should be stronger than our own loyalty to ourselves. We must be careful though, that our loyalty to our enemies is not stronger than our loyalty to our disciples, family, friends, and God. That is why it is appropriate for Christ to keep quiet when falsely accused, and to pray for the forgiveness of his enemies, yet to call names and throw insults with the best of them in other circumstances.