I am not a dog fighting fan, I could not do it.... I am not a dog man, I am a man who owns dogs... but what you have posted has nothing to do with the questions you asked about the dogs and fighting... nothing to do with what these dogs were bred for.. what you have shown is the result of folks who should not own dogs, owning dogs, not dog fighting...
but I also know - there are way more Thugs & lowlifes that Abuse / fight & kill this breed than people who follow the Dogman ways