Chinese nationalists on social media used phrases including “Open Champagne!” to celebrate the death of Japan’s former Prime Minister Abe Shinzo, who was assassinated Friday morning while giving a campaign speech in support of a candidate in the ruling Liberal Democratic Party. Abe, 67, was shot at twice on Friday approximately 11:30 a.m. local time in the city of Nara, close to Kyoto, while he was giving a campaign speech for Kei Sato, a fellow Liberal Democratic Party member and a national election candidate. Abe was rushed to hospital in…