I'm also going to add this. When I acted out as a child/teenager, all the times I made fun of my mother or was horrible to her, I didn't care whether I hurt her. In my mind, she didn't care about me or about hurting me, so when I acted out my anger and pain, I didn't give two hoots about whether she was hurting too. I did not care about her feelings at all. When I was angry, I was hurting and letting my hurt out. I guess I was trying to hurt her (was I? Or was I just venting?) but I didn't truly believe I could hurt someone who didn't care about me. But, as I've said, I also didn't care if she was upset by anything I did. I was in so much pain, it was all I could think about.
"My mother hated me! My father told me so!"
Living with that belief felt like my insides were being eaten away by acid.