While I'm on the subject of the "inherantly violent" nature of pit bulls, there are two links to other blogs that I think you should see.
First if from KC Soil -- it's a great, 30 second-ish video that shows a pit bull in action. Joe, who writes the blog, is a good friend to the animal community.
Second, is from a blog I've recently discovered called dog-tails. This post describes one of the blog's writer's experience with a dog that came into the animal hospital after being a victim of a dog fight. You'll notice the love this dog showed, in spite of even how it had been trained.