Unfortunately the Scions have a very muted reaction to pretty much everything that works in their favour but is still very much a shady or questionable act.

As much as I adore Hien as a character, the story sure did gloss over the fact that he tricked the Xaela into fighting under Doma's banner. Not only that, but he chose to flood Yotsuyu's base which led to many of those inside drowning or being crushed by debris. Yet when similar tactics are deployed by the antagonists, even in the pursuit of protecting their loved ones and mitigating losses, they're framed as 'unforgivable'.

It's why I don't pay much heed to the supposed 'themes' of the game. They're rarely consistent and embraced or ignored based on whatever is convenient at the time. At the end of the day, both Meteion and Venat are responsible for the bulk of the tragedy and death in the game's story so to me, it doesn't make much sense for either of them to be treated so differently when characters with far less blood on their hands were treated with far more disdain.