Directed and co-adapted for the screen by Oren Jackoby, the 2007 documentary, Constantine's Sword, expands the scope of Carroll's pre-9/11 book to include evangelical Christians among the purveyors of religious intolerance, and Muslims among the victims. The film begins in Colorado Springs, Colorado, home of the U.S. Air Force Academy, where a 2004 Yale University study found evidence of a climate of religious intolerance, and pressure by Air Force officers on cadets to join evangelical congregations. Carroll interviews a former Academy chaplain forced out by the Air Force for supporting the Yale study's findings, an Academy graduate who brought suit against the Air Force alleging religious discrimination, and mega-church pastor and National Association of Evangelicals President Ted Haggard, before revelations regarding an affair with a male prostitute compelled him to step down.
Though Carroll and Jackoby do address religious intolerance at the Air Force Academy and President Bush's statement about the "war on terror" being a "crusade", the focus of the documentary, like the book, remains on the Catholic Church's alleged role in perpetuating anti-Semitism. Carroll interviews historians, clergy, and Jews in Germany, Poland, and Italy to paint a picture of a Catholic leadership that historically was at best intermittently tolerant of the Jews. Atrocities partially or wholly attributed to the Church include the forced conversion on pain of death of Jews, the pillaging and burning of Jewish settlements in the Rhineland by crusaders, the ghettoization of Jews in Rome by Pope Paul IV, collaboration between the Church and the Nazis memorialized in a secret formal pact, and the failure of the Church to this day to accept any responsibility for the Holocaust.
Along the way, Carroll interweaves his autobiography. He's the son of an FBI agent commissioned into the Air Force as a general. As a teen, he considered applying to the Air Force Academy, but chose instead to become a Catholic priest. As a priest, he publicly agitated against the American intervention in Vietnam deeply disappointing his father. Though he eventually left the priesthood, went on to marry, have children, and work as a reporter and writer, Carroll has remained a practicing Catholic.
The film's 95-minute runtime is inadequate to the expansive critique and autobiographical essay that Carroll wishes to tell. Accordingly, many of the charges that he has oversimplified some details and ignored some counter-examples are no doubt true. A 95-minute documentary simply cannot do otherwise, but nevertheless, Constantine's Sword is engrossing, and will likley prompt many viewers to explore these issues in greater depth, and that's all makers of a documentary like this can reasonably hope for.