A helpful statement by James Dunn in connection with the previous post.
Certainly we must be careful about defining Pauline Christianity simply as a kind of Judaism (continuity): but equally we must beware of falling into the old trap of thinking that Christianity can only define itself in opposition to Judaism (discontinuity).
--"How New Was Paul's Gospel? The Problem of Continuity and Discontinuity," in New Perspective on Paul (rev. ed., 2008), 262