Maybe do your research first before claiming to know something. Communism at it’s core is when no private property exist and basically everything is “owned” by the whole community equally. Hence the name communism. Censorship has nothing to do with that. It just so happens every state which was “communistic” (none of these really were communistic) had strong censorship. This is what we call correlation. What you mean is causality which means there is proof the two observation are directly linked.