USSR played the greatest role of any mortal humans in saving Humankind from Nazis. The War was a great tragedy for USSR. RIP all victims of Holocaust and of Nazi Aggression.
Here.
The Bolshevik Jews had already slaughtered 20 million Russian Christians by the time Hitler came to power. In truth, the USSR, under the auspices of the Jewish Third Internationale, was actively preparing an invasion of Europe (witness the enormous amount of captured Soviet tanks, aircraft, and weaponry by the Germans). Germany attacked because they were courageous and committed and un-Jewified, i.e., they looked at the real picture, unlike their cousins in the U.S., who were completely bamboozled by their Jewish controlled press. Plus, they had a leader who cared about his own civilization, unlike FDR.