Not defending any party, it's basic ethological expectation: a creature that try to beat an other should expect aggressive response in return.

Of course, never aggressing anyone and transform any aggression agaisnt self into an opportunity to acculturate the aggressor into someone with the same empathic behavior is a paragon of virtuous entity. But paragons of virtue is not the median norm, by definition.

> Not defending any party, it's basic ethological expectation: a creature that try to beat an other should expect aggressive response in return.

Another basic ethological expectation is that the strong dominate the weak, but maybe we shouldn’t base our moral framework around how things are, and rather on how they should be.