It is so simple, Footballers, generally, represent the fall in standards and morals at all levels in our society. They are just older kids who have become used to getting their own way, with no one daring to tell them otherwise.
Whereas most rugby players have had some sort of education, show basic respect for the guy in charge and are mature enough to understand the meaning of yes and no.
As for the supporters of rugby they can be trusted to have a beer during the game, not make vile racist chants and fight rather than talk.........................football supporters on the other hand...................