You have no idea who Clifton Merrit is nor the extensive documentation available which corroborates his research, do you. It’s all true - go find your own answers.
In typical style - you cite your dogs as perfect and don’t care about other people and pets being killed by other pits.
Fortunately - a lot of people care about more than just themselves and the documentation is mounting up and proving that pit bulls don’t have a bad rap; they are not suitable pets for civil society.
Passing laws to make pit bull owners seriously liable shouldn't bother a pit bull owner if their dog is no threat to others.