Nepal, Nov. 3 -- For many Nepalis, working abroad is less a choice than a compulsion, imposed by a job market at home that offers too little. They go to the old destinations and, increasingly, to new ones. Remittances have propped up the economy, lifted households and bought families a better life. The costs are plain, too: young talent squandered, homes strained by absence. And there is a harsher hazard. When a host country's internal tensions and geopolitical quarrels flare, migrant workers, who have no stake in them, pay first. The latest case is Saudi Arabia, where attacks by the Houthis, a Yemen-based group backed by Iran, have killed and unsettled Nepalis. Nepal cannot fix other countries' wars. But it can, and must, make the safety...