The problem is the owners for seeking out an agressive breed and training them to fight. The trailer park (not airstream) down the road seems to be a training and breeding ground for pitbulls. Everyone has one and it's common for their owners to tie long lengths of half inch chains to their necks to drag around to build muscle. These dogs at least around here are bred to fight and is a tough guy orniment to go along with the jacked up chevy, big chrome wheels, thumpin radio crowd

Just telling it like I see it everyday.
Not unusual to read in the paper about another pitbull attack there and everyone seems to have a cardboard sign up for pitbull pups for sale..
I don't blame the insurance companies for trying to cut their exposure as they are in business to make money not to provide charity. Maybe you could ask the insurance company to exclude dog bites and attacks from your pitbull in their policy? Not trying to be funny but if your dog is no risk then it shouldn't matter?
Dobermans had the same stigma until pitbulls took their place. I love animals but would never choose one that I knew was a known as a problem breed. Why bother subjecting yourself to voluntary grief?
Just my opinion.....