Andy Rooney insulted veterans on Memorial Day

Bitter liberal Andy Rooney insulted veterans on Memorial Day by saying war was our "least noble activity." Since when was defeating Adolf Hitler and freeing millions of people from an evil dictatorship our least noble activity?
From the video:

There is more bravery at war than in peace, and it seems wrong that we have so often saved this virtue to use for our least noble activity - war. The goal of war is to cause death to other people.