Halloween traditionally presents rescue centres with an opportunity to feature black cats looking for homes, as it is a curious fact that black-coated animals generally take longer to find homes. Perhaps it is because of our deep-rooted folklore beliefs such as black cats being witches' familiars or black dogs guarding the borders between this world and the next.
I do accept that there are some badly behaved GSDs and Staffies out there and some have been responsible for some serious injuries. But it doesn't mean other breeds are necessarily "safer". It's just that the dog attacks involving Golden Retrievers or Cocker Spaniels don't make the headlines in the same way.