Pig farmers in the central state of Selangor have spent years trying to keep their business out of Malaysia’s culture wars. A royal decree has dragged them straight into one. The state’s decision to shut down pig farms, prompted by Sultan Sharafuddin Idris Shah, Selangor’s hereditary ruler, has transformed a long-standing local dispute over pollution and odour into a flashpoint touching on royal influence, the livelihoods of a minority community and the delicate balancing act facing Malaysia’s...