Aleksandr Solzhenitsyn said this quote
“ Communism has never concealed the fact that it rejects all absolute concepts of morality. It scoffs at any consideration of good and evil as indisputable categories. Communism considers morality to be relative, to be a class matter. Depending on circumstances and the political situation, any act, including murder, even the killing of hundreds of thousands, could be good or could be bad. It all depends on class ideology. And who defines this ideology? The whole class cannot get together to pass judgment. A handful of people determine what is good and what is bad. But I must say that in this respect Communism has been most successful. It has infected the whole world with the belief in the relativity of good and evil. Today, many people apart from the Communists are carried away by this idea. ”