That's very pedantic.
As Perth Red said "rabbits are a plague on most lands", and there are other examples like, worldwide storms kill thousands of people everyday, sharks, leopards/jaguars and tigers are all known man eaters, knights invaded and pillaged countries and murdered and raped innocent people in their time, vikings did the same as knights but also were slavers, every day all over the world warriors fight battles and St Gorge represents a religion that over the many years since its inception has committed millions of atrocities, some of which are by themselves worse then all the other examples put together! I am sure that if I thought about it that I could find examples for the other teams as well, in fact I bet I could demonize every mascot ever invented.
The point is that everything has a dark side, take knights for example everybody knows the knight in shining armor, and are willing to forget all the bad things (sometimes downright bloody evil things) for that fantasy of the knight in shining armor, and that is alright because the world is a darker place without heroes, and in many ways sometimes knights, sharks, panthers, tigers, vikings, rabbits and even pirates were heroes, and in many ways sometimes police, firemen, soldiers, etc. etc. were villains.