When I see that picture, ideas of "Communism" come to my mind only very late. At first, I really only see one guy who has the balls to stand up against four tanks, on a square the name of which translates to English as
heavenly peace. That picture says so much before speaking of the failure of Communism, or what the Chinese made of it.
Invader said:
These regimes in many cases tried to reach a communist society, Lenin's Russia first among them, and none of them got there; even those that spontaneously rose from a revolution against a right-wing dictatorship (as opposed to forcibly installed by the USSR, for example), like Castro's Cuba, ended up as dictatorships themselves.
Let's be fair. Lenin was a man of good intentions. His misfortune was his soon death and the unscrupulous character that was Stalin. Castro was not a Communist at first. The Cubans only gave their revolution a Communist image after they got support from the Soviets.
And to be honest, although Castro did not manage to give his people freedom, he was significantly better to them than Batista was.
Most people who stood up and revolted in the name of Communism in the first half of the 20th century were heroes. They acted against something and believed in what they did. They only did not get far, because they either died too soon or were too idealistic for their own good and became victims of more power-hungry co-revolutionaries.
That is not to say that Communism is likely to succeed even if implemented only by people with good intentions. But blaming Lenin, Castro, Trotzky or more obscure people like Rosa Luxemburg or Karl Liebknecht for the terrors of Stalin, Pol Pot or Mao Tse-Tung is not fair.
Nevertheless, people should realise that Communism failed, and never had a chance of succeeding, precisely because it is so prone to exploitation by dictators.