I think what is lacking is more information into the owners and raising of the dogs. There is likely a correlation between the type of individual who would gravitate toward owning a pitbull and the environment in which they’re raised. Whether it be for dog fighting, for property protection or any other myriad of reasons, the perception that the dog is a wild feral killing machine is likely appealing to these people and thus starts a cycle with that specific breed being used and trained in a manner that fulfills the stigma.