There will be no musical festivities. No tree-lighting ceremony. No extravagant decorations that normally bedeck the West Bank city of Bethlehem at Christmas. With the war in Gaza raging, this is a city in mourning. In perhaps the most overt display of how Israel’s war in Gaza has dampened Christmas celebrations in the city seen as the birthplace of Jesus, a Lutheran church put up its crèche, but with a sad and symbolic twist. The baby Jesus — wrapped in a keffiyeh, the black-and-white checkered scarf that has become a badge of Palestinian identity — is lying not in a...