Rohan Gunaratna, an international terrorism expert and author of the book Inside Al-Qaeda: Global Network of Terror, conducted a lengthy interview with John, and prepared a written report for the American court to which John was brought for trial. Gunaratna is an expert consultant to the US government itself on terrorism matters. "Those who, like Mr Lindh, merely fought the Northern Alliance," he wrote, "cannot be deemed terrorists. Their motivation was to serve and to protect suffering Muslims in Afghanistan, not to kill civilians."
John described his motivation in similar terms. "I felt," he later explained to the court, "that I had an obligation to assist what I perceived to be an Islamic liberation movement against the warlords who were occupying several provinces in northern Afghanistan. I had learned from books, articles and individuals with first-hand experience of numerous atrocities committed by the Northern Alliance against civilians. I had heard reports of massacres, child rape, torture and castration."