Hi L.,
I agree with you that your father's behavior is abusive. However, I don't agree with not attempting some sort of reconciliation. I guess my rule in trying to deal with people like that is that I will always try to take the high road and be the bigger person. I would acknowledge him on Father's Day, simply because he's your father. That doesn't mean you have to hang around him all the time or that you will have a great relationship. Also, if you want to know what prompted his behavior, I would go see him and ask him. Just be homest and let him know that you're really upset and that you're not sure what you did to get him upset, but that you want to resolve it. That puts the ball in his court, and then you can be at peace knowing that you tried. If he doesn't respond favorably or appropriately, then you can always keep your distance, but I would still acknowledge Father's Day, birthday, etc., at least with a card, because that's taking the high road. Maybe your stepmother would have some insight for you? Good luck.