The AfD are far more frightening a right-wing group, and have far more power, than e.g. UKIP in Britain. I believe that because Germans refuse to see the Holocaust as anything other than a singular event they are now at risk of repeating it all over again. Their inability to relativise it (if that can be taken to mean to put it in a historical continuum in which other events of comparable atrocity are committed) means it's snugly in the past. I think this leads to a false sense of security.