Six months ago, armed terrorists burst across the border from the Gaza Strip into Israel and unleashed a devastating massacre, during which 1,200 people were killed and more than 250 were taken hostage by Hamas. What followed has been a war that on some level everybody appears to be losing.

That reality will be writ large Sunday — in the vigil for the hostages still not returned, on the streets of Tel Aviv where protesters will gather, in the rubble of Gaza where the dead pile up, and in…