User blog comment:Nerdyanimegirl225/The 3 picks/@comment-24039250-20140515191124/@comment-7418318-20140515200607

Regarding 2: I wonder if maybe Makarov's wife had a hand in calming his nature down a bit.

I really hope we'll learn a bit about her at some point. I doubt it'll be in Fairy Tail Zero itself, since that story will play before Makarov's birth, but maybe in one of the side-stories of the magazine.

Regarding 3: Hades didn't really want to kill the non-mages. His goal was to create the perfect world for powerful mages and that everyone with weak or no magic would die was just a side effect. He didn't lose any sleep or even regret this sacrifice, but it was not his actual goal.

As for Acnologia, yep, but he doesn't just kill Humans without a second thought. He also plays with them a bit before going for the kill when he feels like it.