Luffy would never attack Fishman Island, the place he was protecting. However, the world government can use 1 Seraphim Luffy to trick and attack this place
Summary of Chapter 1064: Punk 01 revealed in One Piece 1065. Vegapunk's status will also be announced. Meanwhile, Luffy and Bonney gather more information about Vegapunk. Luffy will almost certainly be the first to notice them.