I think Bege shooting Bobbin is too obvious. I actually think that the Germa 66 soldiers were the culprits. My (baseless) theory is that somehow the Germa 66 soldiers are aware that they were clones and they are now getting their revenge on the Vinsmoke family. It is also possible that they have aligned with the group working on a coup to overthrow Big Mom. Just my idea. If someone has already thought of this sorry, not trying to steal.