Man, I am so sorry to hear that :( (If I may ask, what country where you originally from?). I'm glad you taught your child that; Bullying hurts people so easily and the effects can stay with that person for life.
But sadly, like you say, bullying can begin at home by a sibling (or worse, a parent). Then we wonder why kids grow up and become addicted to drugs or try to become terrorists. I hope you were able to overcome that experience, I'm sure the jerk who bullied you isn't "cool" anymore