A narcissist will find ways to punish those who reject him.
He constantly seeks validation and recognition from others and will often put others down to inflate his own ego.
He's addicted to the spotlight and has an insatiable need to be recognized for every single achievement.
They act out in ways that are not aligned with their innate personalities. And the act of name-calling may be a way to relieve these feelings. He probably did not have close ties with too many people, as a sociopath is incapable of feeling shame, guilt or remorse.
A sociopath has little concern for another person's feelings, desires or needs.