"My Brother the Jihadist" chronicles British filmmaker Robb Leech for over a year as he sets out to understand why his step-brother has fundamentally changed his life and beliefs to become an extremist. Like himself, Leech's step-brother Rich Dart was an ordinary white middle-class boy from an English seaside town until he moved away. Then his family learned through the media that Rich had become a radical Islamist, changing his name to Salahuddin.
Leech follows Salahuddin to demonstrations, gatherings, and into conversations with like-minded Islamists. Associating with jihadist fundamentalists, he believes the U.K. should be ruled by Sharia law.
The film exposes Robb's attempt to reconnect with his step-brother as he watches in vain for any lessening of Rich's hostility toward his country and fellow citizens. As Robb spends time with Salahuddin, he witnesses a very particular phenomenon -- the embrace of radical Islamism by young men, many of them white.