Yes, that has been going on since before WWII
Ask Aleksandr Solzhenitsyn (author of The Gulag Archipelago). Ask survivors of The Holodomor "death by hunger" caused by Stalin. (2.6-10 million deaths) And yes, ask the survivors of The Killing Fields (2 Million Deaths at the hands of Pol Pot). Certainly, Communism Kills and kills the spirit and will of the survivors.
Yes, that has been going on since before WWIIAnd they have to be called to account.