User blog comment:Miskos3/Fairy Tail 522 & 523: Gray's Trump Card & Is Destiny Burning, Review/@comment-130.105.140.184-20170218075015/@comment-31.132.65.54-20170218161601

@B214 So now we are saying the Tartaros acted on their own and that Zeref was not involved? So a guild of demons, that were created by Zeref, suddenly attacks Fiore, targets the Magic Council. Who, by chance, are in charge of the continent two prime defense systems (Etherion and Face), that happens to be the means for keeping the militant kingdom of Alvarez at bay. Both systems get destroyed, and that Alvarez accidentally decides to attack a year latter. Alvarez which conventionally happened to be lead by Zeref himself.

I know this is Mashima story and he is free to write any BS he wants. But from a real life perspective saying that Zeref was not involved in the massacre of Era is incredibly naive. There is to much convenience involved for this to just be a coincidence.