My column on the subject is up now. Richard Langworth has more:
While it’s nice to hear the President invoke Sir Winston, the quotation is unattributed and almost certainly incorrect. While Churchill did express such sentiments with regard to prison inmates, he said no such thing about prisoners of war, enemy combatants or terrorists, who were in fact tortured by British interrogators during World War II.
The word “torture” appears 156 times in my digital transcript of Churchill’s 15 million published words (books, articles, speeches, papers) and 35 million words about him—but not once in the subject context. Similarly, key phrases like “character of a country” or “erodes the character” do not track.