Sergey Sternenko once headed the ultranationalist Right Sector movement in Odessa A right-wing Ukrainian activist and military blogger, who was once reportedly offered a job by Vladimir Zelensky, has apparently mocked the death of Pope Francis. The Vatican announced on Monday morning that the head of the Catholic Church had passed away at age 88. Sergey Sternenko, the former leader of the ultranationalist Right Sector movement in Odessa, gained notoriety in 2018 when he stabbed a man to death.