Jewish leaders continue to decry Mel Gibson’s forthcoming Jesus movie for supposedly threatening to whip up anti-Semitism. Due out next April, "The Passion" identifies Jewish priests as instigators of the crucifixion. Maimonides, too, in his Mishnah Torah, affirms Jewish involvement in Jesus’ execution — which must make the greatest of medieval Jewish sages an anti-Semite, too. But the film I’d like to see produced that would really make some Jews nervous, while teaching a healthy lesson: an honest depiction not of Jesus’ death, but of his preaching. The Christian Bible makes clear what was probably the main theme of his...