The point was not in the response to the snake biting you. The point was in the labelling of the snake. Do you judge a snake for its natural tendacies or in spite of them?
The snake can't choose to refrain from biting someone, it must follow its instincts.
A state however can choose to attack a weaker country or it can choose to cooperate. The difference comes down to the kind of world we want to live in: One in which the strong prey on the weak or the one in which the weak are protected by the strong. I believe the latter is superior to the former.