I think we actually fundamentally agree - and I will say that until XL bullies came along I was no great fan of BSL (it's proponents often seemed to be motivated by non-evidence based beliefs - staffies look unfriendly, they're owned by chavs, I just don't like them etc etc). But XL Bullies are different, given the statistics on fatalities in the last 3 years or so, and I would support a ban. To be completely honest I'm surprised the police haven't dealt with them before now as being 'pit bull type' under existing legislation.
Fundamentally, it can be the breed, it can be the owner, and it can be the individual dog. It can also be the past owner - I'm always conscious that the person holding the lead might just be the person doing their best to resolve problems not of their making.
Indeed, since acquiring a small rescue dog with behaviour issues, I've become completely intolerant of crap training methods, and much more tolerant of people who have dogs that have behaviour issues but are making good efforts at resolving issues while keeping everyone safe.
I would however note that I wouldn't necessarily trust the mother's judgement of the dog. While I'm sure she's not purposefully lying, she could be as clueless as my own mother, who has variously 'diagnosed' him with a 'mad look in his eye' (he was doing zoomies, entirely innocent) and asked what on earth he was doing when he was clearly presenting his hindquarters for a scratch. In the same circumstances, my own mother would only be able to parrot a few things I'd said to her about the dog, and would be entirely unable to add any well informed comments of her own.
When it comes to references to killing the people they know and love - I think it's important to note that fatalities by dogs of all breeds almost always involve household members (or guests) - they are the people they spend the most time with, and we tend to be more careful around other people's dogs than our own.
Some of the dogs below almost certainly aren't living with absolutely perfect dog owners that have a deep understanding of dog behaviour BUT that applies to all dog breeds. If there's a breed that has genetic issues to the extent it can't be safe with people who aren't perfect dog owners then it should be banned because there aren't that many perfect dog owners!
I completely agree with this - there really is just no margin for error with XL Bullies, and when things go wrong they go wrong quickly, seriously, and with no real means of getting things back under control.
You can, however, get it significantly wrong with a chihuahua - or even an equally heavy Newfoundland - and no one will die.
It's like giving a Ferrari to someone on their first driving lesson.