The dog fighters are the ones destroying a certain breed of dog. They destroy dogs physically and mentally, and over breed them (poorly) and the ones that don't die end up dumped in shelters.
The scum of the Earth fight dogs, and the dogs they destroy are Pit Bulls. Other scum of the Earth commit other crimes and they seem to like Pit Bulls for their powerful look, they don't treat them well either. And bad breeders supply these scum-bags. Certainly lots of very good people own pit bull type dogs, and generally these dogs are fine, but if they end up with one that has been horribly bred and/or tortured, it might not be fine even with all the good care they can give.
It's all sickening and an abusive system, mainly to one type of canine. 
I own a border collie, so my dog's literally not in that fight, but I've seen very well behaved pit bulls doing a great job at dog agility. Like all types of dog, an owner needs to know the tendencies associated with it. I know my dog wants to herd other animals and small kids. Some pit bulls have a tendency toward dog aggression. No breed/type doesn't have it's tendencies that need management. My Mom's Papillion, despite being treated like a Princess her whole life, is a biter (because she gets what she wants that way and isn't corrected or trained otherwise, like a number of small dogs), the fact is that if she were the size of a Pit Bull she would have killed someone already. When a larger dog happens to be human aggressive it just turns out a lot worse than when it's a tiny dog. Bad breeding or bad treatment can contribute to human aggressive dogs, no matter what breed.
End the dogfighting and the thug mistreatment of dogs and the market for poorly bred BYB pups should start drying up.
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