Before WWII, the Bolsheviks spread communism through Russia and it's neighbors, unifying into the USSR, then built forced labor camps, imposed famine through land reforms, and conducted purges, so 30 million were murdered by their fellow Soviet comrades. It would be well if they can also have an annual day of remembrance for them.
I think he only reason the US allied itself with "Uncle Joe" was that we knew the Nazis were the greater threat. But the Soviet government never deserved sympathy. And once the war was over, for the next 50 years they fought a Cold War with us, on the backs of their enslaved populace. If they won, we here would be in mass graves, due to our "collective guilt".
Let us not lose sight of these things.