You are incorrect. There has never been a communist government/society. The all are, ultimately fascist dictatorships. A TRUE communist society would never operate in the way we have seen.
You really believe that?
If every significant attempt to incorporate on a large scale, communism, results in authoritarian/dictatorships that become poster children for terrible human rights abuses, and terrible economies, all of which fail, or creep out of darkness by shedding some of their ill-fated designs, at what point in the repeated experiment with identical results do you accept it? I mean, the old line about insanity is doing the same thing but expecting different results applies here.
Think of communism as a computer program with certain givens and parameters. It's lovingly designed, it's mathematically precise, and fantastic. Naive college kids from around the world fall in love with its elegance.
When we run that program in a human system, it always gives the same, tragic, predictable output. You want to suggest we've never "run the communism program"??
We run facism, we get the same, predictable output.
From the perspective of power/freedom, it is so exactly like facism, that it's the same program with a string substitution for "nation" -> "people"
Oh it's for the nation, oh it's for the people. Meanwhile it's the same authoritarian regime attempting to control the political and economic liberties of the state, comitting terrible atrocities in the name of "nation/people", falling way behind the rest of the world, etc.
And why take up the left/right argument? It doesn't communicate any information.