I don't know or remember slavery in the south. I read it in a book.
Nobody is alive in 2005 can remember Southern slavery, but the subject must remain in books so those which soft soap or attempt rewrite history should be countered with the truth, whenever they try to peddle their deliberate distortions of historic realities.
In terms of Nazi Germany, they are those which state the 'Holocaust never happened" but there are living victims, survivors of the Nazis, most in advanced age, buy many victims continue speaking out regarding their first hand experiences of the broad-based diabolical crimes committed against humanity, in an effort to remind people about those horribly murdered & adversely effected by the ruthless regimé of Germany's 3rd Reich.