Ideological Rigidity and Flexibility of Secular and Religious Terror Groups: The Case of the Palestine Liberation Organization and the Palestinian Hamas opencrim July 2, 2017 Ideological Rigidity and Flexibility of Secular and Religious Terror Groups: The Case of the Palestine Liberation Organization and the Palestinian Hamas2017-07-02T07:41:37+00:00 Studies in Conflict & Terrorism . Go to Source Author: Alon Burstein