Kryvyi Rig, Ukraine: Roman Gerstein, an 83-year-old Ukrainian Holocaust survivor, has a blunt riposte for Kremlin justifications of its invasion: “There are no Nazis here.” For supporters of Russian President Vladimir Putin, Ukraine’s alleged “genocide” of Russian speakers in the country’s eastern regions is comparable with the actions of Nazi Germany. And that, they argue, requires “de-Nazification”. Gerstein is having none of that. A slightly built man wearing an oversized suit, his eyes twinkling behind round glasses, he explained how he had to flee from real Nazis. “In fact I am one of the few people to have been evacuated...