User blog comment:B214/Chapter 504: Rift/@comment-4945830-20161002203645/@comment-1359322-20161003014313

So you're saying the Devil Slayer magic is corrupting Gray to the point where his head has completely become useless?

Gray wanting to kill E.N.D. is fine, and perhaps no one has the right to stop him from doing that too. But there's also the thing called time and place. Is this the correct time to fight Natsu? Gray's friends are risking their very lives to reclaim their guild, and here he is fighting Natsu for? And what is he going to do if any of his friends died because he was wasting time fighting Natsu? Blame E.N.D. for killing his friends? Blame Erza for not protecting them? Or blame Zeref for everything?

And the fact that Gray can even say out Juvia's name makes Gray look even more terrible. Juvia sacrificed herself to allow Gray to live on and reclaim the guild, their guild. How is fighting Natsu going to help at that goal? The current Gray just seems like someone who's acting dumb and unreasonable using Juvia's "death" as an excuse.