Because people's perceptions are hokey, and also, some people are naturally afraid of every single dog. Throwing them in the gas chamber because some hyper-sensitive idiot thinks the dog was threatening is ridiculous. You should know as it is that even VISUAL testimonies are often faulty in criminal courts. Much less "feelings".
Wow, talk about reading something into something. But, thanks for the info, didn't realize we had the gas chamber for dogs.