User blog comment:IamJakuhoRaikoben/Chapter 451: Fairy Heart, Review./@comment-96.255.231.61-20150908065101

"Also, no one in Fairy Tail is willing to kill an opponent and gets all up in arms when someone does"

What? Loke wasn't particular perturbed by Zoldeo's death, Erza wasn't really bothered by Azuma's death, Juvia largely ignored Zancrow's death. Fairy Tail killed most of Tartaros' top members in battle, with the only member that can truly be confirmed to be alive being Franmalth. They weren't all that bothered by doing so. Certainly no one got pissed at Mirajane for blowing up Ezel's regeneration tube finishing him. No one got angry at Erza for trying to kill Kyouka, or at Minerva for finishing her off. Juvia blew Keyes to bits, and got a thank you from Gray for it. Heck, what's his face back in the Sun Village arc was eaten by a monster Natsu then incinerated to relight the eternal flame. No one was really bothered by that.

What upsets Fairy Tail is casual disregard for people's lives, especially for the lives of one's comrades.