There has been a rumor that suggests Beria, knowing he was about to become the victim of Stalin's next purge, was the one that poisoned Stalin, reportedly telling the remaining Politburo members, who themselves were about to be killed, "I just saved all of you."
There are lots of rumors in the Soviet Union. Stalin was a very paranoid man. Stalin died a slow and painful death, which does justice. I know Stalin wanted to deport every Jews in the Soviet Union to Siberia. It started with the Doctor's Plot and some Jews spoke out against Nazis in Soviet Union and how they were covering up the Nazis's crimes.