Although Zabuza seemed a bit of a bleeding heart in front of him, Yagura still believed he stood on the moral high ground.
So you, Zabuza, keep claiming you killed to support the villagers' outrage? Only your killings had extenuating circumstances? You did it to wake everyone up?
Yagura gave a disdainful smile, a flash of fanaticism crossing his face. He had enforced the Bloody Mist policy for the Land of Water's prosperity and for Kirigakure to dominate the Shinobi World, too.
Wasn't killing a required course for a ninja? If you couldn't swing the butcher's blade, what use were you as a ninja?
Wasn't the Bloody Mist policy meant to make ninja more lethal? If they couldn't swing a butcher's blade, how could they face ninja from other villages?
Besides, people weren't born knowing things; they learned them. Who graduated already proficient at swinging a butcher's blade? Killing was a technical skill. It took practice.
What was wrong with sacrificing some people for Kirigakure's glory? Yagura felt there was absolutely nothing wrong with what he had done.
He had to make Kirigakure's ninja show their edge first. They needed to learn to swing the butcher's blade before anything else.
As for whom that blade swung toward, or how exactly they showed their edge, don't ask.
Ask, and you would get a taste of a Bloody Mist ninja's pride.
And Yagura had something to say about those massacres that knew no bounds, too.
The great ninja clans relied on the advantage of their bloodline limit ninja and never followed orders. That was a recipe for chaos. Disobedience on the battlefield could get thousands of soldiers killed. Better to prepare early and use those people as whetstones to sharpen the Bloody Mist ninja.
What was wrong with slaughtering those great clans