From what I have read Stalin was about to start a very major, anti-Semitic pogrom in the Soviet Union but then he suddenly died. The day he died is known as the Little Purim because he died on Jewish holiday of Purim.
http://www.aish.com/h/pur/t/ts/48955726.html
The article goes on to relate something less widely known. “That February,” it states, “the Kremlin ordered the construction of four giant prison camps in Kazakhstan, Siberia and the Arctic north, apparently in preparation for a second great terror — this time directed at the millions of Soviet citizens of Jewish descent.”
That terror, however, thankfully never unfolded. Two weeks after the camps were ordered built, Stalin attended the Blizhnaya dinner and, four days later, was dead at the age of 73.
Stalin, according to his successor Nikita Khrushchev, who was present at the dinner party, had apparently collapsed after the feast, at which, Khrushchev also recounted, the dictator had gotten thoroughly drunk. The feast ended in the early hours of March 1.
Which, in 1953, corresponded to the 14th day of Adar, otherwise known as Purim.
Stalin´s Death 50 Years Ago This Month: A “Little Purim”
http://www.freerepublic.com/focus/f-news/863970/posts
One of the creepy things Stalin would do during dinners with the Politburo, would be to stand up right in the middle of dinner and say that he poisoned all of their drinks, it was just a big joke to him.