>>He was obviously quite correct. One good nuke on the Kremlin and millions of lives would have been saved. <<
Last number I heard (from many years ago) was Stalin killed 8 million Soviet people. Was it not he who said “a single death is a tragedy — a million deaths is a statistic?”
A lot more than that. The death toll from the Stalin-engineered famine in Ukraine was 7 million.
I think 20-30 million is closer to Stalin's real number.