Yes, you’re right. Sometimes I think that communism is merely an economic system. But thinking about Stalin, Mao and Il-Sung, whose communist developments where economic, social, democratic and whatnot, it’s sometimes hard to discriminate the noise from the useful information too.
Besides, I can’t understand why communists / tankies are so prone to support dictators. Dictatorship is not exclusive to communism, even capitalism had and has some kind of dictatorships: Hungary, Belarus…