That is Western propaganda. You should read about the genocide in Indonesia against PKI, which
was the communist party of Indonesia and the largest communist party in the world until 1965-66 when they were massacred by the military man Suharto and his Western-supported mullah gang. It was a genocide, with one million, some say more, communists and their sympathizers. Why isn't this genocide spoke of in Western capitals and in the United Nations Security Council ?
And other places like Iraq, Libya and Syria where socialism came to government but were subverted by Western-supported factions or terrorists. Syria is still in a nine-year-war and fighting thousands of "moderate" "rebels".
It is unfortunate that the great industrial development in socialist USSR was not replicated in WB, Kerala and Tripura. In India although at a certain level the communists / socialists did good even by existing they should have learnt from lessons from other socialist / communist experiments in the world.
I have proposed a communist economic system in
this thread. I think I have simplified communist economics further. You should go through the entire thread. Please leave your comments there.