You're getting downvoted by people who don't know shit / never set foot in a Western europe classroom.
This is documented : the role of the USSR in WWII victory was erased from public school programs and constantly downplayed in media.
There are numerous traces of the controversies that arose around this throughout the decades.
So, USSR took a break from killing it's own people to killing Germans instead?
Not really. They pretty much stayed on course with both programs throughout the war — and this was true for those in the military just as much as civilians. The policy of shooting anyone who hinted at retreat, combined with treating Soviet POWs as traitors (which encouraged soldiers to fight to the literal death), contributed to both tallies.
its*
Well the even parts of Europe where USSR won those countries lost. Only Europe “won” by US/Britain can be considered free/independent. Those who were on the USSR side were hardly better off under USSR than Nazi Germany.