Ruth Langer offers an in-depth study of the birkat haminim, a Jewish prayer for the removal of those categories of human being who prevent the messianic redemption and the society envisioned for it. In its earliest form, the prayer cursed Christians, apostates to Christianity, sectarians, and enemies of Israel. Drawing on the shifting liturgical texts, polemics, and apologetics concerning the prayer, Langer traces the transformation of the...