The sad and compelling story at the center of Sonia Kennebeck’s documentary Enemies of the State is about the the lengths parents will go to for their children. Despite putting parents Paul and Leann DeHart at the forefront of the documentary and relying on their point of view for the story about how the government prosecuted (or, in their telling, persecuted) their son Matt, there’s little emotional impact in a film that’s geared more towards a the tone of a paranoid thriller. The structure of Enemies of the State, rather than being upfront with the audience, invites …