No doubt, bullying is shameful and bullies are nasty. However, they haven’t always been so. When the word bully made its first appearance in English in the 1530s it meant ‘sweetheart’, ‘lover’.
Then, at some point it took on an additional meaning of ‘protector of a prostitute’ and its fate was decided. Over time, the original meaning was forgotten leaving us with the current ‘harasser of the weak’.