So much for History is written by the victors!
Similarly, the years 1933 to 1945 are stricken from the collective German memory. The older generation will not talk about the war years, but there is enough remembrances by Germany's neighbors that the war years are known to the general population. Also, there are proscriptions against Nazi regalia and symbols. The German population are aware of the Nazi's camps and the Holocaust.
I don't believe the amnesia runs as deep in Italy because this former Germany ally was also occupied by Germany from 8 September 1943 to 8 May 1945. The Germans were very cruel occupiers where they were in Italy and there's no love lost.