There is a difference between being selfish and being self-focused. Suppose you have a throbbing knee after a workout. Is going to the sports medicine clinic selfish? No; it is an issue of self-care. Being motivated to be psychologically more healthy upon forgiving is similar. Your motivation of self-focused care may change to a different motivation as you proceed with the forgiveness process. Your motivation may then include the other person, as you develop a concern for this person’s well-being.
For additional information, see Forgiveness for Individuals.
You make a good point about anger sometimes becoming part of one’s identity. Also, at times people are fearful of confronting their own anger because they fear an inability to be rid of this. Yet, once a person realizes that forgiveness is a kind of safety net for the unhealthy anger, they tend to go ahead with forgiveness because they have more confidence in their ability to eliminate this excessive anger.
Also, with regard to the theme of identity, people can transform their identity, from resentful persons to persons who are caring and who do not let others’ injustices define who they are. If you see receptivity in your father regarding forgiveness, you might want to talk to him about these two themes: a) forgiving is a safety net for his anger and thus that anger will not overwhelm him if he starts to look at his own father’s behavior; and, b) his identity might change in a positive way.
For additional information, see Learning to Forgive Others.
Please do not think of forgiving as a kind of pill one takes for a headache. You do not take a forgiveness pill and then wait a little while for complete relief. Forgiveness, instead, is a process, a challenging process, that takes time to develop. We find that the more severe the injustice against a person, then the longer it may take to forgive. If you work at it, we find that people tend to feel some relief in about 12 weeks; others still may take much longer, but even in this longer process, you might sense that your anger is diminishing, which can motivate you to keep at the forgiveness process. Anger is not necessarily entirely eliminated when a person forgives, but hatred (very deep and abiding anger) does tend to diminish. I am encouraged that you are considering forgiving even with hatred in your heart. This, to me, is a good sign that you will make progress in your forgiving.
Yes, my colleague, the psychiatrist Dr. Richard Fitzgibbons, has case studies of this kind in our book, Forgiveness Therapy, 2015. Not all people who show major depression or bi-polar disorder are excessively angry with other people, but Dr. Fitzgibbons does screen for this. When people with significant mental health challenges show unhealthy anger caused by unjust treatment from other people, then Forgiveness Therapy is warranted and shown to be effective in these case studies.
For additional information, see Forgiveness Research.
The point of forgiving is to offer goodness toward the one who acted unjustly. Yet, one very common motivation is to forgive to feel better, to rid oneself of resentment. This motivation (relief from suffering in the self) is not the same as what forgiving actually is (a gift to the other).
For additional information, see What Is Forgiveness?
The 20-step Process Model was not built to be an inflexible, demanding system. Instead, think of it as a road map. On your journey to forgiving, you have the option to stop at 20 different places. Some may be irrelevant to you, or perhaps you already worked through some of the steps. It is just fine to move on to another step. Also, it is fine to go back and revisit some of the more challenging steps as you see a need for more work on that step. So, no, you are not cheating.
For additional information, see How to Forgive.
Let us focus on the second question first. According to the philosopher, Trudy Govier, there are distinctions among primary forgiving (in which you were directly hurt by another), secondary forgiving (in which you are resentful because of injustice toward another person about whom you care), and tertiary forgiving (in which you are resentful toward someone who is quite distant from you or a loved one, such as a politician who behaves badly). You are discussing secondary forgiving because you are resentful of another who behaved badly toward your mother. So, yes, you can legitimately work on forgiving this person.
Why is this one so hard? I think it is because your mother likely is going through much pain because of the person’s offense and you are reacting to this deep pain in your mother. Secondary forgiving is not necessarily always more difficult than primary forgiveness. The difficulty depends on the depth of the injustice and the depth of hurt experienced by your loved one and you.
For additional information, see Can You Forgive an Entire Group?