Quoted in The Last Days of Hitler: The Classic Account of Hitler's Fall from Power, Hugh Trevor Roper, Chapter 2, Hitler in Defeat, note. 104 (Google Books).
I know Roper’s reputation was tarnished when he was taken in by the forged Hitler Diaries but this appears to be real quote an is revealing of the place minds can get to.
It wasn't the quote I was looking for, I remember reading that Goering looked on the destruction and welcomed the bombs because the German people had shown themselves as unfit by losing the war but have been unable to track down them reference.