It

This is 'it'. 'It' is about the DSM and accountability. 'It' is about what we do and why we feel the way we do about the crimes this administration has committed in our name. Mary Ratcliff at the American Street:

[. . .]

This is why it is essential that even if Rep. John Conyers' hearings do not have real teeth, that we gather and weigh the evidence and that we bear witness to the sin done in our name. To do otherwise is to betray that earlier generation and the ideals for which our country once stood.