An explosive row has erupted ahead of a key Holocaust memorial in Germany - with survivor groups demanding a government minister be banned from one of the most horrific sites of Nazi terror. Wolfram Weimer, Germany’s Culture Minister, has been told to pull out of a planned speech at Buchenwald c oncentration camp . He is accused of a “lack of understanding” for victims. Around 56,000 innocent people were killed by the Nazis at Buchenwald through shootings and executions, brutal beatings and