Honestly, whether Gorgan is being truthful or not, I'm not sure, but if we take what he said at face value, it's fucking crazy he's willing to throw the entire world into darkness just because his comrades didn't make it back. That's fucking war, what did you think war was? Eligion ended the war, and most people finally found peace, even on your own losing side. Dude just decided fuck everything, I'm going to have everyone die. It's not like they were assassinated unfairly or something, they died as a casualty of war. That's what fucking war is. Deciding to revive the demon lord because of that is insane. Dunno what Kanaria's reasoning is, but I have a feeling it's also unjustifiable.
Sad really, I really like Kanaria (sans psycho chaos bulslhit). She's my favorite after our beloved Judith-sama.