User blog comment:IamJakuhoRaikoben/Chapter 493: The White Dragneel, Review./@comment-24951162-20160711181713/@comment-130.105.225.146-20160712101503

I heard this same answer about wanting to slay Acno, but that only adds more questions, and I don't recall him saying that.

Unless we get a confirmation to why he betrayed Ishgar, I cannot and will not recognise this implied answer as we still don't know everything about God Serena, so agree to disagree.