Because this isn't a game where the losing side gets a handicap to keep the score being a blowout.
"Plenty of people are telling the racists he is racist, I'll assume the role of 'Making sure people are too mean to the racist'" isn't how reality works.
Fair enough. \
So from now on any 77 year old is fair game to punching the head, provided the puncher is black and says they were called names,