Can we stop with this? I fly rescues as a hobby and of the dozens of pits I've had, I've literally never encountered a hostile one to spite having to put the dogs in a somewhat unsettling environment. Yes, you can train them to be hostile like any dog, but targeting them specifically is insanity.
Absence of evidence is not evidence of absence. And in this case your conclusions are drawn on even less... there actually is evidence that contradicts the absence of anecdotes on which you build your conclusions.
Actually most studies agree with my experience. You can cherry pick some that don't but ultimately if people have the perception that X dog makes a good fighting dog, they train them to become a fighting dog therefore skewing the stats. It doesn't matter what dog you start with, you can make a golden retriever a viscous killing machine if you're abusive or encourage violent behavior, which is also abuse.
Well, sure, but if your goal was to create a vicious killing machine, would you be indifferent to the breed of the dog? Pits aren't good fighting jobs simply because people perceive them to be.