This is a soul-searching moment for the Jewish left. Actually, for many Jewish liberals, navigating the gloomy politics of the Middle East is like walking with two left feet.

I would know. For six years I was the literary editor of Tikkun magazine, a leading voice for progressive Jewish politics that never avoided subjecting Israel to moral scrutiny. I also teach human rights at a Jesuit university, imparting the lessons of reciprocal grievances and the moral necessity to regard all people with dignity and mutual respect. And I am deeply sensitive to Palestinian pain, and mortified when innocent civilians are used as human shields and then cynically martyred as casualties of war.

Yet, since 9/11 and the second intifada, in which suicide bombings and beheadings have become the calling cards of Arab diplomacy, and with Hamas and Hezbollah emerging as elected entities that, paradoxically, reject the first principles of liberal democracy, I feel a great deal of moral anguish. Perhaps I have been naive all along...