Its a bs villain growth, and a Very sudden massacre, but the organization was very very dumb, they kinda deserved It, but not the commom people that suffered because of It.
But idk yet whats the point to do that in the story, and i dont like the Idea of OP New Magic developed by this secondary villain, not a fan of the story in the recent chapters.
Well If its not a dream or something to revert It a tragedy tag should be added to this manga.