Michael Walzer wrote a short piece for The New Republic's website several days ago about "proportionality" and the Israel-Gaza war. The piece was characterized by a writer at Crooked Timber as a "waffly piece of blah." It is true that Walzer raises questions without explicitly answering them. However, I do not find the tone of Walzer's column to be as objectionable as the CT commentator does.
P.s. Those interested in just war theory will find the comments thread attached to the linked CT post worth perusing.