What's your point? Can you not appreciate something just for what it is?
I do appreciate the beautiful melodies for what they are, but for me me hearing them is bittersweet, knowing they are the crowning expressions of monstrous regimes that killed 100 million people. Those songs also have lyrics expressing ideas that are murderously at odds with me. I'll give another example - could a Jew that lived through the Holocaust listen indifferently to the beautiful strains of "Deutschland Uber Alles" without remembering some bitter associations? I grew up in the cold war period and have no love for Communists, including the one in the White House. Some music conjures up such memories. That's my point.
Try sometime to just listen to it for what's there, and to remember that the vast majority of people are just like you and me. Most Russian people who are stirred by the beautifully haunting melody and harmonies have as much contempt for the Soviets as you and I do.