Genetic time bombs through no fault of their own. They were bred to literally fight huge bulls in pits surrounded by rowdy humans egging them on, but unlike the English Bulldog (same history) their breed became preposterously large and over-muscular over time while greedy asshats nurtured them to fight other pit bulls.
Put down the dogs out of mercy - put down the pitfight-running humans for the good of society.
I was flying into Cabo San Lucas last year and there were fighting rings out in the Baha. Even right in downtown Cabo they still have a Bull fighting arena. The difference is they don’t kill the bull anymore.