In the play Hamlet, the title character and protagonist seeks to avenge the murder of his father. In one scene he waits in a chapel to ambush his father’s killer, only to decide against this at the last moment. The reason Hamlet decides against taking revenge at this moment is that he wants his father’s killer to go to Hell, and does not think that will happen if he kills the man while in prayer (the dramatic irony is that, unbenounced to Hamlet, his father’s killer was only pretending to pray and thus would go to Hell if he was killed there).
Now very few people actually go on bloodthirsty vendettas, but everybody has been wronged by another person to one degree or another. Sometimes these wrongs are irreparable, and sometimes they are against not us personally but against people we love. Is it unethical then to feel hatred for somebody who irreparably wronged us or our loved ones?
Now some bible verses seem to discourage this (Matthew 5:43-45 has Jesus telling us to forgive our enemies), while others seem to treat it as perfectly reasonable (Psalm 58 and Psalm 83 are prayers for God to kill enemies - not to reform them, not to show them the error of their ways, but to kill them).
So what do you think? Is it acceptable to feel hatred towards somebody who irreparably wrongs you or your loved one?