After that video of Floyd making racist rants against Pacquiao and his false belief of his culture, it was natural that some of Manny's fans would retaliate back. The problem as I see it is that the retaliation was not targeted to Floyd alone but to his entire race since Floyd attacked Manny's...
This is a Manny Pacquiao inspired question.
I only know of Roberto Duran who was a natural lightweight like Manny but he went on to beat guys at Middleweight and win titles there. I am also familiar with Jack Dempsey because most of my sparmates at the gym unintentionally do his Dempsey roll...