But for others, the scale of the Oct. 7 atrocities has left them struggling to even empathize with Gazans, let alone retain hope in a peaceful solution to the conflict.In 2018, Mr. Klein Halevi, the author, wrote a book addressed to an imagined Palestinian, “Letters to My Palestinian Neighbor,” in which he attempted to set out a vision for a shared future between Arabs and Jews in the Middle East.Since Oct. 7, Mr. Halevi said, he has found it hard to even consider what such a future looks like. An observant Jew, he still prays for Palestinians, but more from duty than empathy, he said.“I spent years explaining the Israeli narrative and absorbing the Palestinian narrative — and I tried to find a space where both could live together,” Mr. Klein Halevi said.“I don’t have that language right now,” he said. “It’s emotionally unavailable to me.”