Using violence against another human being in any other context than defense of one's self or others is aberrant behavior. The desire to watch it as entertainment is probably worse. "People have being doing it for years" and "it's a hell of an endorphin rush" are not defenses. People have been doing all manner of terrible things for years and they do all manner of self‐destructive things for an adrenaline rush. If you like to fight or watch fights I think you have an untreated mental illness and no amount of bullying can change my mind. I won't be intimidated or shamed into walking back a single thing I've said. I think you're a danger to me and my loved ones and I do not want to interact with you.