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

Okay, I feel like it needs to be clarified what Grays thought process is for some people, the comments about "Gray is an imbecile/Gray Sucks" cuz he is attacking Natsu are actually triggering me.

So, FT is about friendship, that was made abundantly clear long ago, and after Invels words, Gray starts to hate Natsu, thats what the consensus seems to be.

However, people are not looking at this from GRAYS perspective. His friend that he has known most of his life, has a secret identity that he just now finds out about. He had to learn this shit from an enemy instead of his friend, the enemy told him the truth and his best friend kept such a secret from him. For around a DECADE. He most likely didn't believe Invel at first, but seeing Natsu going all demon instinct made it true.

Basically he feels that this secret is a huge act of betrayal, because Natsu most likely knew about Gray's mission to kill E.N.D., The mission his own father gave him. To Gray, E.N.D is the reason he had no father for all that time, E.N.D. could have been responsible for Deliora, E.N.D ruined his life, that is his thought process based on information from Silver, and you are going to tell him not to believe his own blood? I assume most people would believe it the same way if they were in his shoes.

In conclusion, to Gray, Natsu hid being E.N.D., the entitity that Gray believes to ruining his life and being behind not only his fathers death and undeath, but also the war with Tartaros. Natsu is a massive traitor to him based on what GRAY knows, don't think that what we know, and what he knows are one and the same. Rant done.