While I don't fully understand the logic behind your actions, I definitely have to say that you're taking a moral high ground by doing this. With that said, you're not obligated to give any person anything beyond basic respect, and even that goes out the window when they start being a jerk to you. Do try to reach out to them and reestablish a good relationship. However, don't try to "win them over" in any way when they don't respond well to you the first time you try. This will only make your situation worse. And of course, be careful. After all, people had their reasons to be mean to you (not your fault, obviously), and those reasons may not go away just because time passed.