We want to believe that age brings wisdom, some sense of how everything fits together. Or failing that, equanimity, grace. Maybe just mellowness.
Beyond the guard who was killed too young and for no good reason, that's the nastiest shock in the Holocaust Museum Shooting. James von Brunn has lived 88 years. He's seen the horrors of war and probably some acts of heroism that transcend it. He's lived through Depression before and seen the country rebound from it. And from his life's experiences, all he's taken away is a list of targets.
Age can bring wisdom, of course. But finding it takes effort, and it requires you to reach out. The attacker of the Holocaust Museum is a worst case scemario of the kind of ingrown hate that can result from the failure to do that.