OZAN KOSE/AFP/Getty Images China is waging a widespread, coordinated mass crackdown on its Uighur Muslim minority. Though the brutal campaign is most active in the western Chinese region of Xinjiang, the Uighurs' homeland, many Uighurs abroad say they have also been targeted by Chinese agents. Members of the Uighur diaspora described receiving mysterious automated calls, eerie Facebook comments, and being threatened by Mandarin Chinese speakers in real life. Uighurs abroad have also discovered their relatives in Xinjiang vanished by Chinese authorities days after they spoke out for the Uighurs. Visit Business Insider's homepage for more stories. China's unprecedented oppression of Uighur Muslims goes beyond the borders of Xinjiang, the western Chinese region where most of the ethnic minority live, former residents told Business Insider. Under President Xi Jinping, China is waging a widespread counterterrorism campaign on Xinjiang, also known to Uighurs as East Turkestan.