Disagree by scale

It’s easy to say “communists have killed more people than the Nazis” because there are vastly more communist countries than there were nazi countries (one). Comparison by simple “death count” alone is not very useful though, because many attributions of deaths of communism include famines that had been recurring since before communist liberation (and were ended shortly after), and additionally many attributions of deaths of communism also include all soldiers involved in all conflicts, including the deaths of fascist soldiers who fought them.

Waving around a large number saying one gorillion have died so you must not seek liberatory ideology is childlike analysis fit only for reactionaries trying to find reasons that the world’s free-est societies were bad, actually. Saying people died to free themselves so you should not try to be free is a thought terminating cliche meant to shut down further thought and discussion.

The fact is is that the Nazis believed in death as a requirement, they idolized war and treating the imperial core of their country the same that the imperial periphery was treated before.

Additionally, marxist-leninists believe in liberation. They established a union of republics in the most diverse region on the planet, that brought democracy both in the workplace and in government. It was not always perfect, even Deng said that Stalin was “70% Right and 30% Wrong”. For an overview of the democratic structures of the soviet union see here. For a general overview of soviet history, featuring an academic SU scholar, and specifically how the diversity and democracy of the soviet people were respected (and sometimes disrespected) take a listen to this. For an overview of why the Black Book of Communism is unreliable as a source of communist “deaths” (as useful as that even is in the first place) enjoy this video here. <-- Most relevant to this discussion

All of what I’ve said too even totally discounts the communist revolution in China, which is it’s own discussion altogether. Through even just a basic understanding of Chinese History, there is no comparison of the lives lost due to neglect of infrastructure and the people between CPC rule and KMT rule/Dynastic rule. The CPC has not always been perfect, but it has always strived towards extending democracy, food security, preservation of culture, and happiness to the lower classes of China.

tl;dr the most significant contributions of communist countries are finally ending recurring famines in their regions and to fighting fascist powers, both of which have themselves saved more lives than could ever be attributed towards deaths of their respective communist administrations.