Pitbull people tend to foam at the mouth when they read anything negative about Pitbulls. They do not accord the right to Freedom Of Speech in others though they expect to say and feel what they want. That denial of a possibility of a problem with a dog(even though there has been no problems) then causes them to comment later if there is an attack.."He/she's never done that before". Just be aware with any dog to never let your guard down. Always expect the unexpected.
Pit People will often bring up Cesar Milan due to his work with Pitbulls. First off, Cesar is not in denial of some traits in the breed. He has called them Gladiators and Killers. Don't get me wrong. He has much affection for the breed. BUT he is not only a professional dog trainer(with staff to help with the dogs) but ensure they are properly contained, trained, socialized and disciplined when needed. He also will acknowledge when a certain dog/person are not a good fit due to the dog. lifestyle or personality of the individual.