Six formerly communist EU countries want to make denying communist crimes a punishable offence, like denying the Holocaust. Lithuania, Latvia, Bulgaria, Hungary, Romania and the Czech Republic have called on EU Justice Commissioner Viviane Reding to take the appropriate steps.
The Frankfurter Allgemeine Zeitung (December 16) approves:
“Even today both the Western European Left and many people living in the post-communist countries in the East still don’t find it a bad thing to play down the terror of the communist dictatorships. Apologists of Leftist totalitarianism have long been considered socially acceptable well into the centrists’ ranks.
“But they’re not. They deserve the same fate as Holocaust deniers: exclusion from respectable society. If the constant initiatives by some Eastern European states make condemning the communist dictatorships as acceptable in Europe as condemning Nazism, then initiatives like that of the six foreign ministers must also be applauded.”
Eric Koch’s book, The Weimar Triangle, is available at Indigo-Chapters and in your local bookstore. 
Denial does not provide for mourning and healing. We can only look to Turkey and that still festering stain called the Slaughter of the Armenians.
Holocaust deniers are an apparent fringe group, not taken seriously by normal people. Making a denial of Communist crimes a punishable offense is probably meaningless, but it might be useful.