A new generation is growing up with a less close contact to the generation that can tell first hand stories. Today's schoolchildren--by far not all of them, but many--no longer meet living relatives (i.e. grandparents) who tell them horror stories they witnessed. They get taken to the KZ sites, but often take the tours with detached ("OK, whatever" ) attitudes, with iphone earplugs in their ears and music to block out the "boring" history lesson. Those who went to school under the socialists in the East were taught that their whole population had no connection whatsoever to the horrors committed by the Nazis. All the Nazis and ex-Nazis were in the west, according to what the SED taught them in school. NOW the children there get taught the standard West German curriculum, but anyone under the age of 45 or so got the old Eastern propaganda drilled into them. Most now know it was BS, but some don't.
The German education system still has retained some of its Darwinian aspects. It has rigid standards, and children in secondary school go through a merciless natural selection to weed out "inferior" students, when some of the brightest get left behind merely because they don't speak up often enough in class.
To the government's credit, it is still their intention to make sure that all schoolchildren understand what the Nazis did, and who they were. Nazi propaganda is still forbidden by law, and even Fox "News" was refused a license to broadcast there because their propaganda style of reporting was just too close for comfort.