I'd rather murder his ass and be done with him threatening the cattos or G-d forbid the kittens ever again. Hirrud has no excuse of corruption, or brainwashing, or scraping by for survival, he is just an irredeemable and dangerous asshole. Edit: Tossing him into the deepest, darkest, most secure cell in Khor'minos and throwing away the key is a decent alternative, I guess.
Speaking of dangerous assholes, a choice to lop off Nakano's hand is something I'm very sad is missing from the game, because unlike killing him I feel it would have been an appropriate punishment for his actions the Champ would have been able to justify to the rest of the kitsune. Plus the edgelord doesn't need two hands to be able to pet Kinu or write bad poetry, so nothing of value would be lost.