Germanshepherdsmum
Some dogs are very aggressive towards others but wonderful with people. Get one of them in the mix and trouble is guaranteed. My current GSD is very gentle and friendly with people but hates other dogs (knowing her background I understand why). I act accordingly and she is never put unmuzzled in a situation where trouble could occur. It’s incumbent on the owner to understand the dog and manage it accordingly.
GSM
If all dog owners were like you - we probably wouldn't be reading about these tragedies.
It's not just a matter of intelligence, but knowing and understanding your dog's breed and background which you seem to have taken the time and trouble to research.
Unfortunately, I think some buy a dog impulsively and are not prepared to put in the effort, time - and expense (apart from the initial outlay) - that any well-cared for dog demands.
