@BackToLurk
and they often have to be goaded quite brutally to fight other dogs because it doesn’t ’come naturally’.
I don't think that's true. I listened to a podcast once which included a bloke who had grown up in a dog-fighting environment. He was pretty clear that the dogs that were fought, and were bred, were the ones that wanted to fight.
Some breeds are more dangerous than others (though not every dog within a breed will express breed traits). I have a breed which is dangerous for wildlife if it's not kept under control. It's notorious for a very high prey-drive and for going self-employed hunting across the countryside. I'm not going to tell Joe Bloggs that yeah, sure, they're all sweeties who will make lovely pets, because that's not fair to him or to the dogs. They are very human-social, but they need a lot of training, exercise and mental fulfilment before you can enjoy them as pets. They're also very dog social because that's been bred into them for generations, because hunting dogs that fight other hunting dogs are a complete liability.
A breed with dog fighting in its genetics is going to have a different behavioural profile. Many dogs within that breed will make perfectly fine pets, but others - the ones who want that bite-and-shake outlet and don't get it, who respond to squeaks and wails as if they're the noises made by animals, who have a low arousal threshold - are much more likely to bite. Couple that with massive and very strong jaws and you have a catastrophe on your hands.
People need to understand the behavioural package that comes with certain breeds. Dachshunds and terriers are likely to bark (and chase mice etc); retrievers, even after generations of being bred for show, will often be very keen to retrieve, and so on.