The problem is not that these breeds are inherently aggressive towards humans. The problem is that they have tremendous bite strength and in the pit, the style of grabbing and holding targets creates tearing in the target when the target tries to move or the dog shakes its head trying to break the neck of the target. People who die from dog attacks generally have had a major artery severed and they bleed out. Children may have a broken neck.
You will see many, many posts here saying that it's all the owners' faults and in how the dogs were raised. That is a flat-out falsehood and a very common and dangerous misconception that gets lots of otherwise intelligent people into trouble.
Dog who aggressively attack humans are dogs with terrible temperaments, excepting those specifically trained for protection work (and those dogs should only be aggressive on command). Note that I said 'dogs', not 'breeds'. It's not a breed issue, it's an individual dog issue. You just hear more about it when a dog with an extremely powerful bite attacks because they do more damage.
Temperament is largely genetic. No amount of love and training is going to change the dog's genetic temperament.
ETA: Greek, I don't know why people persist in believing it's all down to how they are raised. In Americans, I think it's our national mindset-you can do and be anything if you just try hard enough! It gives people a sense of agency and potency to believe that they can change anything, even if it's inherently dangerous and false to believe so.
And these 'solve any problem in 23 minutes' dog training shows don't help there, either.
Somehow the message that training and socialization are important (which is a valid message) has been extrapolated or misunderstood to mean that all dog problems are fixable if you just apply yourself. They rarely mention that euthanization is sometimes part of 'applying oneself '.
@Memphis Belle: My dog is not a dog with a great temperament. She is highly dog aggressive. Yes, that is manageable, but not easily. It's taken years of training to make her reliable and controllable on-lead, which she is. Would I ever trust her off lead where other dogs could be? ABSOLUTELY NOT! Do I take the appropriate precautions to manage her? Yes I do. Are the easy? NO, THEY ARE NOT! Do I occasionally need to leave her in the care of others, and am I up nights about it? ABSOLUTELY!
I've described my odyssey with the Jester repeatedly here, and I am not going to do it again today. She is a problem dog. I am in no way patting myself on the back to say that few would go to the lengths that I do to make her as safe as possible. It just happens to be true.
If she had shown this level of aggression towards humans she'd be long dead. She was nearly euthanized by me because her first aggressive incident involved two broken fingers in the person who tried to intervene. I had to be very seriously and knowledgeably talked out of killing her. And you know what? 90% of dog owners would have ended up putting her down by now.
I was fortunate, and so was the Jester, that I had a lot of experience and unlimited funds behind me because I make a good living and grew up showing dogs. And no shame at all in introducing myself around the neighborhood with flyers with photos and strict warnings that my dog was NOT good with other dogs. Who the hell does that in real life?
You confuse me to no end. You seem to understand how to train, yet you persist in believing that every dog can be saved. Eventually, with more experience, you will change your point of view because you are a smart woman. You just aren't there yet.
I used to be like you until I got the Jester. I had grown up in a happy, candy coated world of dogs that had been bred for good temperament. The Jester rocked my world to its foundations and I became a believer that temperament is genetic. I didn't train my dog to be aggressive, I did not use harsh training methods, I didn't let her get away with dissing me, etc.-- yet she became horribly dog aggressive at maturity. Hello genetics! Sad to meet ya! ( No, I am not letting myself of the hook here by blaming genetics. I had been involved in training and showing at least 100 dogs by the time I got Jessie. I was no neophyte.)
Temperament is what it is. It's immutable. The sticking point is determining what is temperament and what is poor management, and only experience gives you that yardstick. You'll get there because you are intelligent and have some dog intuition. You're just lacking in experience and time will remedy that.
Overt aggression toward humans is ALWAYS a temperament issue, however. No breed is bred to turn on its handler. That should be obvious.
I DO NOT consider myself to be a martyr. I made a commitment to my dog and I've stood by it. But she has totally changed my life. I would have several dogs if not for her. That is simply not possible until she passes.
I grew up in a Show Dog family, so guess what? We all have lots of dogs! Does the Jester impact my relationship with my family? You betcha!
Can I do normal dog lover/dog trainer/dog exhibitor activities? Uh, NO!
Did I make the right decision in giving the Jester a good life? Highly debatable. She will always be a risk, no way around that. I can't have more than one dog, where I expected to have several by now. I can't be involved in any dog sports or activities because I own Cujo. The dog world would be better off if I put her down and got on with it. But I take my commitment to her seriously, even though it's limiting me in every conceivable way. Who is to say what was the 'better course'?
If I hadn't stood by Jessie, I could have rescued several dogs by now. Could have fostered dozens! From a larger, 20,000 foot view, I have totally messed up.
For the 'all dogs can be saved' crew: WHO SAVES THEM? And at WHAT COST? Do you ever think it through, down to the nuts and bolts of daily life? Do you? Who pays for all this 'rehabilitation'? Who does the training? How do the trainers measure success? Do you want to live next door to one of these dogs? Would you report them to Animal Control when they made a mistake, like treating your dog as a chew toy?
The bleeding hearts do not have unlimited funds and unlimited space and can't make most of these dogs reliable to be owned by your next door neighbor, can they? Something to consider.