The defendant wants to hide the truth because he's generally guilty. The defense attorney's job is to make sure the jury does not arrive at that truth.
A great number of publications and movies on the history of the 20th century - albeit of uneven quality - are evidence of a growing demand. Quite recently, the state-owned TV channel 'Russia' aired a series based on Varlam Shalamov's works, showing the terrible, cruel truth about Stalin's camps. It was not watered down.