Nothing wrong with communism, the idea is far better than capitalism. It's just ruined because humans are shitty creatures that love to destroy for eachother. Probably doesn't help that shitty American schools bunch it together with a lot of other, irrelevant, things like dictatorship and censorship and call it evil. It's like saying capitalism is evil because it supports stealing.
Also, the countries the US calls communistic weren't all that communistic; the leaders hogged much of the profits instead of using it for the good of the people.