For many years, the Chinese government has been accused of locking up members of the Uyghur minority population in “re-education camps” and even of genocide against the Muslim ethnic group who live in the northwestern region of Xinjiang. And now Elon Musk, currently the richest man in the world, has been drawn into the debate over China’s behavior after his electric car company Tesla opened a showroom in Xinjiang. China has rejected charges of forced labor or any other abuse there, saying the camps offer job training and companies must follow its policies there. Last Friday, the American electric car...