Honor Diaries is an important film that explores the brutality and systematic inequality faced by women in Muslim-majority societies. It features both believing Muslim women, like Dr. Qanta Ahmed (whose compelling essay about the film was published here at National Review Online yesterday), and former Muslims like Ayaan Hirsi Ali, the renowned author and human-rights activist.
The purpose of Honor Diaries is to empower women by shining a light on the hardships they endure — including "honor" killings (i.e., murders over the perception of having brought shame to the family by violating Islamic norms), beatings, genital mutilation, forced marriage — particularly of young girls – and restrictions on movement, education, and economic opportunity. The film highlights authentic Muslim moderates struggling against the dead-end of Islamic supremacism.
So naturally, the Council on American–Islam Relations (CAIR) does not want you to see it.