The reason he was resisting his old lives is because he is a pacifist. It would be a major break of character for him to be aware that he is murdering hundreds of people and not caring. I don't even mean in terms of him being a pacifist either, regular people, especially children, do not react to the deaths of hundreds of people with indifference.
So shouldn't he have been resisting the ocean spirit potentially killing off most of an army, and definitely killing off Zhao?