Return to Athens for a moment

Archbishop Rowan Williams has made the headlines big time with his remarks about the apparent inevitability of sharia law being incorporated into mainstream law in Britain. (See here for links to lots of articles). One main theme in reaction has been his reversion to being a theology professor, forgetting that he is the Archbishop of Canterbury. Hence the reappearance of 'Athens' in the title of this post! My comment is simply this: if Rowan Williams can get this kind of thing wrong, what is he getting wrong in his handling of Communion matters?