Open this photo in gallery: David Johnston, Independent Special Rapporteur on Foreign Interference, presents his first report in Ottawa on May 23.Sean Kilpatrick/The Canadian Press Leaders of Canadian activist and religious groups targeted by Beijing are calling for a public inquiry into foreign interference, saying it isn’t enough for former governor-general David Johnston to hold hearings to listen to their concerns about China’s efforts to silence their criticism. Groups representing human rights activists, Muslim Uyghurs, Hong Kong pro-democracy dissidents, Falun Gong practitioners and supporters of independence for Tibet told The Globe and Mail they’ve been sounding the alarm for years…