Bears are pretty violent and this dog has no way to defend itself
Besides, if he does start getting violent, we can just take the bear out of the room and separate the two
Ah, see, the difference between your analogy that uses irreversible physical violence and the actual situation at hand is that blocking an instance or defederating takes a single button click, and isn’t at all difficult for the dog to do.
Also a flawed analogy because in this case the chihuahua is a barely alive clone of a dog that is still much much healthier and actively trying to kill it, that bear might be the only thing that prevents the original dog from killing it.