One is a pistol-packing ex-member of an outlawed Jewish militant group. The other is a religious fundamentalist who once called himself a "proud homophobe". Both are West Bank settlers averse to Palestinians' self-rule - let alone their hopes of statehood. And as senior coalition partners to reelected Prime Minister Benjamin Netanyahu, Itamar Ben-Gvir and Bezalel Smotrich will be within reach of the levers of power - a troubling prospect for Israel's once-dominant secular-left and friends in the West. Netanyahu turned to the ultra-nationalists after centrist parties boycotted him over his long-running corruption trial. He needs their support to stay in...