I honestly don't think the breed is inherently dangerous, but they are simply powerful dogs that many people have no business owning. We had a close family friend whose arm was ripped off, by her boyfriend's pit bulls that have known her for years. There's not much room for error as far as training goes, when the dog can easily maul you.
I have Bichonne Frisé, and he's not the best trained dog admittedly, but I at least know that in-case some freak occurrence does happen, the potential for bodily harm is severely limited. I like pit bulls aesthetically, but really don't think I have business owning one, my family is unstable and that shit would rub off. It definitely did on my Bichonne's crazy little ass, lol.
I really don't want to blame the animal, many people don't have any business with them. I can't blame someone who doesn't trust pit bulls, but I simply don't trust most humans to raise one with a good temperament, and place most of my blame there.