I think the objection is to the use of the word "deserve,"-at least that's my objection. No dog, even one that has killed "deserves" death. The use of the word implies the dog is being put to death as some sort of capital punishment or administration of justice, when the fact is that dogs don't live by those rules and codes, only people do. Dogs can't form criminal intent, they are animals acting on behavioral impulses. Yes, it may be necessary to euth a dog for aggression, but it should not be done out of administration of justice (as the term "deserves to die" implies), but for the safety of the public and the breed itself.
The biggest challenge we face today is the hordes of the clueless yet well-meaning dog owners who do not understand dog behavior as they should, not even the behavior of their own dog. People understand what barking, growling and baring teeth mean, but they often do not notice a dog's discomfort when the dog is just sitting quietly, licking his lips with ever expanding whale eye. Even people who work in professions where they SHOULD at least know the basics (such as veterinary hospitals, dog daycares, etc) often do not. There needs to be a massive campaign launched at educating the masses about stress signals and how to read them. I think that would go a long way toward preventing bite incidents in all breeds.