[Retroman]

All dogs have instincts, all dogs have teeth...
All dogs are capable of being provoked into a reaction, whether you provoked them on purpose or by accident. Just like people.
I have a small shitzu and a lhasa apso, both very similar types of dogs..but both completely different. The Shitzu gets angry, growls, tries to bite etc, it isn't vicious and doesn't try to harm you seriously, but still. The lhasa apso is very scared and timid, but can still be provoked into growling and biting when the shitzu provokes it.

Maybe the entire breed of pitbull shouldn't be judged, but the individual dog.
Im sure there's many pitbulls raised from puppies into calm, affectionate and tame dogs. And many older pitbulls who are relaxed and quiet.

It'd be the equivalent of arresting everyone in a community, because the community is known for violence. When plenty of those people are just trying to live their lives and don't cause any harm.