Why did the Soviet prosecutor at the Nuremberg Trial accuse the Nazis of electrocuting 600,000 Jews?

The Soviet Communists were eager to demonize Hitler as much as possible, because it distracted the world from concentrating on the millions of people that were killed by Stalin during the 1930's. Look up "holodomor" to read about the Soviet-induced wheat famine in Ukraine in 1932-1933 and the millions who died there. As bad as Hitler was, Stalin was much worse.