User blog comment:Miskos3/Fairy Tail Wiki in the Anime vol. 1: Fall 2015/@comment-5303512-20160112034657/@comment-1776824-20160112035420

The whole point of the first major part of Nanatsu no Taizai is that no one is actually evil. It was all a plot by, I guess a good way to kind of say this is, someone who wanted revenge against Meliodas and nothing else. People were just manipulated and made to believe that the creed they were fighting by was the correct one.