To love means to be. When you love someone, you must allow that someone to be as they choose to be. That is the nature of free-will. Free-will can be called Love. When someone acts out of hate or anger, they may act to prevent another from being, denying their free-will. People misunderstand this concept when they talk about good and evil. When someone recognizes an act that appears to be evil or bad, the tendency is to react with like emotion: hate, anger, etc. In order for someone to act out of love, the person would allow each person their right to free-will.
For example, if you see someone acting violently against another, the reaction that is not of love would be to attack the attacker. In your mind, this may seem to be the correct action, and one that loves the victim. But this is not true love. True love would instead cause you to protect the victim and you would "turn the other cheek" to the attacker in defense of the victim. In this manner, you are allowed the freedom of choice, the victim is protected and thus receive the love you desired to give by acting, and the attacker would also be given their right to free-will. They would not be denied your love either. This is what true love means. Judgment and punishment is not love. It is the appearance of love, but in reality, it denies it. One might argue that if the attacker is not stopped, then they may continue to behave in the inappropriate manner. But again, that is the nature of love, to give free-will to all. As the rain falls on both the good and evil, so too does love cover over all sins. Therefore, it is not the act of love to deny anyone their right to free-will. Rather, true love protects, rather than punishes.
Many will not accept this belief because they feel that to love is to have justice. But in reality, justice really means justification. The one who seeks justice is looking to justify their right to act out of their own free-will, but deny the free-will of another out of a belief that their own act is out of righteousness. In reality, it is self-righteousness that compels them because it is they who deem what is right and wrong for the other person. When someone retaliates out of the compulsion for justice or revenge, there is no difference between the person who initiated the unjust act and the person who acts out of a sense of justice. It is only justification that absolves one over the other. That is the nature of judgment. But because of free-will, a person can act out of their own sense of justice against another. So right or wrong, it is not about justice, but rather about justification. But to do the same thing as the accused makes them no different except in their own mind. In essence, the person who judges another desires to act out in the same manner as the perpetrator, and so cries out for justice as a means to justify their feelings to act out in like kind, not recognizing that it is the "evil" act that they actually want to condemn. They are justifying their right to commit the same act that they rage against in the name of justice.
In this world, it's easy to see someone who acts in a way that is "evil" or "bad" and feel anger or disgust. It smacks in the face of reason not to feel this kind of reaction as it is an aspect of our own free-will. But the reason why we feel this way is because of the act itself, not necessarily the person who committed the act. However, because the person who committed the act embodies that act, we feel the urge to judge the person. Right or wrong, it is a response that comes from our limited understanding of experience and deeply held beliefs, including racial prejudice, self-righteousness, and the instinctive desire to survive. It is a long road to not only recognize these kinds of beliefs, but to have the desire and reason to change them and ultimately to actually change those beliefs. This is why the bible described life as a wide and narrow road, to show how few people consciously make the effort to take the narrow road which requires changing of beliefs.
I have mentioned before why such "evil" acts occur. If you accept that your existence is not the body, but eternal, then you existed before your current life began. If that is the case, then there may be purpose to any life situation or event selected by you and those who will be involved in your life drama. You and those involved in a "unnatural" event such as a violent act or even disabilities, chose such a circumstance prior to the experience in order to learn from them. If you accept that life does not end upon death, then it is not hard to see why this has purpose.