What Sunni Islamic fundamentalist political movement had a hand in the disillusionment of Nasser al-Bahri?
Nasser al-Bahri:  After four years, al-Bahri became "disillusioned", largely because bin Laden consolidated al-Qaeda's relationship with the Taliban by giving his bayat to its leader, Mullah Omar, but also because he had married and become a father. Taliban: The Taliban (Pashto: ‎ "ṭālibān " "students"), alternatively spelled Taleban, which refers to itself as the Islamic Emirate of Afghanistan (IEA), is a Sunni Islamic fundamentalist political movement in Afghanistan currently waging war (an insurgency, or jihad) within that country.
The Taliban