Haspel, Bush, Cheney, Trump Etc. are ignorant amateurs. The army field manual which they disregarded was based on the work of Cpl. Hanns Scharff a German interrogator of downed allied pilots. Without as much as raising his voice he got so much information from them that they were in danger of prosecution after the war. Read "The Interrogator: The Story of Hanns Joachim Scharff, Master Interrogator of the Luftwaffe" by Raymond F. Toliver.
More recently FBI agent Ali Soufan did the same with al-Quaida captives. Read: "The Black Banners: The Inside Story of 9/11 and the War Against al-Qaeda" by Ali Soufan.
Unfortunately, today in a post truth world people are more likely to believe what they see in the movies and TV over the real experts.