It's all about how the dog is raised. I don't believe that they are born "bad" I love my pit bull.
Look at the eyes on that demonic fucking dog. God I cannot stand these creatures. Why oh why oh why do people keep them as pets?? You wouldnt keep a puma, or a leopard or a wolf as a pet, generally, as they are DANGEROUS. Some people never learn unfortunately. Ive said it before, I dont care how "affectionate and well-behaved" these horrible dogs are; the proclivity for violent attack is part of them, and at some point, it will surface, no matter how well-socialised they are; problem with these dogs is when they do eventually go postal, they do a lot more damage than a frigging poodle could do!!