I guess that excuses killing about 20 million people. And enacting policies that resulted in another 6 million dying from famine and another 4 million from miscellaneous causes related to the regime.
I am sure that Stalin was a friend of the Jews. Though we do know he was an enemy of Hitler after Hitler betrayed their non-aggression treaty (a betrayal that caused him to hole up in grief for several days).
lets look at this:
"Not even ten years after the Nazi destruction of European Jewry, Josef Stalin was bent upon the same course. Decades of purges, executions, imprisonment's and exiles of tens of thousands of Soviet Jews had escalated during the early years of the Cold War into a full-scale attack upon Soviet Jewry. By early 1953, the media launched daily attacks against the Jews under the pretext of the infamous "Doctors plot" in which Jewish doctors were accused of planning to poison government officials. As a result of the accusations, numerous doctors and other Soviet Jews were incarcerated, and executed. As in Nazi Germany, and so many other nations throughout history, they were used as scapegoats for all of their nation's woes. Hounded by both the media and the police, the Jews of the Soviet Union, lived in terror. The driving force behind the terror was Stalin.
Stalin's onslaught against the Jews was not something random; there was a calculated purpose to his madness. At the time, rumors had already become widespread that he was planning to deport thousands of Jews to Biro Bidzhan (an alleged Jewish autonomous region) and Siberia"
http://www.jewishmag.com/65mag/stalin/stalin.htm
So what stopped him from killing ALL the Jews?
"At the end of February 1953, a meeting took place between leaders of the Soviet regime. There, Stalin revealed his plans for Soviet Jewry. No Mordechai or Esther was present, but Haman was there. At the meeting, Stalin's pent up fury reached a crescendo and exploded into an uncontrolled rage, which resulted in his death and perhaps the salvation of millions."
But in a wonderful moment of poetic justice (the "Doctors Plot" was when Stalin had all the Jewish doctors killed):
"As Stalin's rage reached a crescendo, he collapsed on the floor suffering a massive stroke.
As he lay stricken, no specialist arrived to help him. They were all executed and imprisoned during the "Doctor's plot." Fifteen to 20 minutes' later, doctors arrived. Stalin was brought to his private apartment where he lay gravely ill. Soviet party leaders surrounded him, many eagerly anticipating his imminent death and the end of his reign. In his final gesture, he pointed his finger towards those present at his bedside including his daughter suggesting their guilt or complicity in a conspiracy to kill him. Then he died."