All the bullies I know were bullied themselves. My older brother was bullied in 1st grade, and that was when he *really* started bullying me. He did my whole life, but it got to be nearly constant shortly after that. My dad is mean because his dad was mean. My mom is mean because her mom is mean.
I don't get angry with others easily, but sometimes I feel rage when I do something wrong or stupid. Occasionally I'll have so much anger that the only thing I knew to do is take it out on either myself or others. I'll just want to scream at someone for no reason, someone who wouldn't fight back, like the dog, and it makes me feel horrible to recognize that in myself. It makes me feel just like my mom. I can only manage to be decent if I fantasize about killing myself over and over in 100 different ways instead. It's like my rage has to manifest as hate in some way because that's all I know.