ah yes the evulz corporations amirite?
what did arasaka did to V? In corpo path they fire you, that's about it. Sure Johnny hates arasaka, despite the fact that what happened to Alt was HIS and only HIS fault. Alt was hostile tookover from another corp, nothing would happen to her originally. Johnny caused the disconnect and thus her death in real world, even AI Alt hates Johnny for that. What exactly wrong did Saburo do to V or anyone, really? Nothing.
In the source material he's a dogmatic nationalist and Arasaka under him behaves like it's always Warcrime'o'clock? I would say those are reasons enough to cap Saburo