That is a true statement, at least fron what I’ve observed.
Only Golf exceeds Baseball as a civilized sport. But yes, the fans can present a different story. I recall one or two times when somebody got beat up after a San Francisco Giants game. This one fellow got attacked in the parking lot by two guts wearing the colors of the losing team. He was in a coma for weeks. Still alive, but can’t work outside the home anymore.
Some years ago someone wearing a Giants shirt got beaten up outside the Dodger Stadium in LA by a couple of Dodgers fans.