I think it would be in their best interest to begin teaching their youth about it. After all, the newer generations weren't alive for it and can more easily accept the fact their nation has a rough history (which nation doesn't?) I would find it awkward to be a German these days. Or perhaps a German youth who has to learn via the internet that his nation was responsible for the only two World Wars to date. The Russians don't shy away from their history or genocides and nor should the Germans. Interestingly enough, the brutal history of Russia is actually infused with the identity of being a Russian in the first place which is the polar opposite of what Germany seems to be doing by not teaching their youth about World War II.