JDEIDEH, Lebanon — It was not how Father Maroun Ghafari had envisioned this Holy Week — for years, he had held Easter sermons in his predominantly Christian village of Alma al-Shaab in southern Lebanon, near the border with Israel. This year, he is preaching from a Beirut suburb, beside a cardboard cutout depicting his church in Alma al-Shaab, now caught in the crossfire between Israeli forces and...