Purim
There is a tale in the Hasidic Chabad movement that supposedly Joseph Stalin died as a result of some metaphysical intervention of the seventh Chabad leader, Rabbi Menachem Mendel Schneerson, during the recitation of a discourse at a public Purim Farbrengen. Stalin was suddenly paralyzed on 1 March 1953, which corresponds to Purim 1953, and died 4 days later. Due to Stalin's death, nationwide pogroms against Jews throughout the Soviet Union were averted, as Stalin's infamous doctors' plot was halted.
1907 Tiflis bank robbery
After Kamo's release from prison, he worked in the Soviet customs office, by some accounts because he was too unstable to work for the secret police. He died in 1922 when a truck hit him while he was cycling. Although there is no proof of foul play, some have theorized that Stalin ordered his death to keep him quiet.