I think they're underestimating people's ability at denial, but this sounds like an apt documentary anyhow:
FOCUS | Bill Moyers and Michael Winship | Everyone Should See "Torturing Democracy"
Bill Moyers and Michael Winship, Truthout: "No political party would dare make torture a cornerstone of its rejuvenation if people really understood what it is. And lest we forget, we're not just talking about waterboarding, itself a trivializing euphemism for drowning. If we want to know what torture is, and what it does to human beings, we have to look at it squarely, without flinching. That's just what a powerful and important film, seen by far too few Americans, does."