Put another way, it has negative cognitive content. Just as those who watch TV news have less knowledge than those who read and watch _no_ news, so the user (and the accepting reader) of the word "stalinism" have reduced total human knowledge. They themselves have less knowledge than they had prior to the use; similarly the reader who accepts the word as meaningful as reduced his/her knowledge.
Carrol
^^^^ CB: Also, it is a main historical form of redbaiting, anti-Communism, anti-Marxism and anti-Sovietism ( I know many people don't think anti-Sovietism is a political fault, but it is). It is also main form of _ad hominem_ error and reckless namecalling and insult in intra-left arguments