Leunig seems to believe that any policy that results in harm to civilians is inherently unjust. But this logic would invalidate the Union cause during the American Civil War because Georgian civilians suffered during Sherman’s march to the sea. It would also deem the invasion of Normandy illegitimate because thousands of French civilians perished during the 1944 campaign to liberate Europe from Nazi tyranny. And this same line of reasoning would contend that there is no moral difference between the death of a Belgian child inadvertently killed by Allied artillery, and the death of a Jewish child in the gas chambers of Auschwitz. After all, a dead civilian is a dead civilian.
And a brain-dead civilian scratches out things like this. If a hospitalised heart-attack victim produced something similar, even Pope Benedict himself would yank out the feeding tube.