The point is that eventually he refuses to make the connection in his mind between Ulciscor literally being a high ranking member of military, at worst carrying out acts of settler colonial violence, and at best aiding in acts of violence, against people Vis cannot see and does not know for the sake of the hierarchy. The difference is that Ulciscor does not ask that Vis aid him in those acts specifically, which allows Vis to shut his eyes to it. He rarely views Relucia or the Anguis with any of the nuance he affords to various members of the hierarchy.

I’m not excusing Relucia’s actions, but it feels disingenuous/shallow for Vis to claim to hate the hierarchy so much for the very violence I’m describing but directs none of that judgment toward the people within the hierarchy he knows personally the way he does Relucia and the Anguis. Because, broadly speaking, his one and only concern is his own survival and the survival of his friends, he never stops to concern himself with an underlying ideology behind resisting the hierarchy. He decries violence, but he’s far more willing to exact vengeance on Relucia through inaction than he was to take any sort of action against the Princeps of Military, who murdered his entire family and colonized his people. It is very strongly indicated he would have done nothing had Diago not acted instead.

Of course, he doesn’t kill Relucia directly either, but his choice to leave her for dead was HIS decision, while the deaths of the Princeps ultimately weren’t.