User blog comment:IamJakuhoRaikoben/Chapter 503: The Last Sight Seen, Review./@comment-5303512-20160926122525/@comment-1776824-20160926143229

The Etherious don't go looking for Zeref out of devotion. Their base instinct is to kill him. Natsu is straight up acting on his activated instinct. I don't know what you're trying to defend.