Controversial historian David Irving has hit back at claims his guided history tours of Polish death camps are ‘sick’. Claiming that it is the Polish authorities who are ‘tasteless’ for their promotion of Auschwitz as a ‘Disney-style’ tourist site, Mr Irving defended his own trip which is fully-booked with American and British tourists. Critics have slammed the trip Mr Irving is organising to Hitler’s headquarters and the notorious death camp Treblinka, referring to it as ‘Nazi Travel’. However, the historian, who was convicted of Holocaust denial in Austria in 2006, has said his critics have clearly not read his books on the Second World War.