You,Tommy,and Wilbur were exiled a while ago and Wilbur swore off L'manburg while you and Tommy didn't,Wilbur soot changed his mind on taking back L'manburg from jschlatt with Tommy and decides he wants to blow it up with him. In Wilbur's view L'manburg is his "unfinished symphony" so now it's useless to continue it but Tommy has grown attached to it because it's the only thing he knows. Wilbur: "Let's blow it to the ground,our unfinished symphony deserves to be unfinished." Tommy: "Wait,you can't possibly mean that."