It's not 'actual analysis' when Parenti does not even mention the massive enforced famine that accompanied collectivization, or tries to explain away the gulag and purges by trying to claim that the Soviet government 'only' executed 700,000 political prisoners during the Great Purge(from official NKVD documents, which are accepted as fact with no questioning whatsoever).
Just because the capitalists have lied a lot about the Soviet Union doesn't mean we should foster our own lies to make ourselves feel better.