Natalia Poklonskaya has issued a harsh criticism of the pro-war Z symbol that has spread across Russia, the latest anti-war comments from the former Crimean prosecutor and onetime Russian lawmaker. The Latin letter — first seen displayed on Russian military vehicles entering Poklonskaya’s country of birth — has come to symbolize the public’s support for Russian troops. The Z has been prominently displayed on buildings, flash mobs organized at schools and universities, merchandise sold online and even on the Russian Easter cake known as kulich. “This letter Z symbolizes tragedy and grief for both Russia and Ukraine,” Poklonskaya, who...