he's walking on thin ice now
(media.scored.co)
That is not even disputed by mainstream historians. When the Russians entered Asuschwitz, all they found was a air raid shelter, that previously had been constructed as a morgue (and in between allegedly as a gas chamber, no evidence for that though). Allegedly, the Nazis converted the 'gas chamber' (which allegedly was just a morgue with holes in the roof and some metal mesh columns) into an air raid shelter and build walls and rooms that hold offices and such. It was all torn down, and they 're-created' the gas chambers by cutting new holes in the roof, and adding these mysterious mesh columns.