No "those dogs" will not just usually kill a kid. A German Shepherd, lab, rott,
ANY dog of size could kill your kid. Wish people would stop acting like it is a certain breed that will be more likely to attack. When it should be that dogs raised, trained, bred and treated wrongly no matter the breed, are more likely to bite or attack.
Yes there are a few rogue animals that will bite or attack for no to little reason but that's far from what most are like. Most dogs that do attack are likely not being managed or treated right in some way.