Abu Bakr Muḥammad ibn al-Ṭayyib al-Bāqillānī (Arabic: أبو بكر محمد بن الطيب الباقلاني‎ ‎ ; c. 940 - 5 June 1013), often known as al-Bāqillānī for short, or reverentially as Imam al-Bāqillānī by Sunni Muslims, was a famous Sunni Islamic theologian, jurist, and logician who spent much of his life defending and strengthening orthodox Sunni Islam.
 An accomplished rhetorical stylist and master orator, al-Baqillani was held in high regard by his contemporaries for his expertise in debating even the most complex of theological and jurisprudential issues.
 Al-Baqillani is often given the honorary epithets "Shaykh al-Sunna" ("Doctor of the Prophetic Way"), "Lisān al-Umma" ("Mouthpiece of the Community"), "Imād al-Dīn" ("Pillar of the Faith"), "Nāsir al-Islām" ("Guardian of Islam"), and "Sayf as-Sunna" ("Sword of the Prophetic Way") in Sunni tradition.
Mawlawi Hibatullah Akhundzada (Pashto: هبت الله اخونزاده‎ ; Arabic: هيبة الله أخوند زاده‎ ‎ Haibatullāh Aḫūnd Zādah; born 1961) is the Emir (leader) of the Taliban, an Islamic fundamentalist political movement in Afghanistan.
The Australian Federation of Islamic Councils (AFIC) (also known as "Muslims Australia") was founded in 1964 as an umbrella group for various small Sunni Islamic groups and councils, and is a Sunni Islamic organisation.
 The mission of AFIC is to provide service to the community in a manner that is in accordance with the teachings of Islam and within the framework of Australian law, and to advocate for the Sunni Muslim community on matters that will affect the community's relevance, settlement and integration within Australian society.
 It is highly debatable whether AFIC represents Australian Muslims, as AFIC run organisations are very few, and their members are not elected by a majority Muslim vote.
Nasser al-Bahri (1972 – December 26, 2015), also known by his "kunya" or "nom de guerre" as Abu Jandal – "father of death", was a member of al-Qaeda in Afghanistan from 1996 to 2000.
 He gave his bayat (secret oath of allegiance) to Osama bin Laden in 1998, an experience he describes in detail in his memoir.
 He was in al-Qaeda for four years, first as one of bin Laden's twelve bodyguards, and then as head of Osama bin Laden's security detail.
 A citizen of Yemen born in Saudi Arabia, Al-Bahri was radicalized in his teens by dissident Saudi Ulemas and participated in clandestine political activities which were funded in part by people trafficking.
 Having determined to become a jihadist he went first to Bosnia and then, briefly, to Somalia before arriving in Afghanistan in 1996 in the hope of joining Al-Qaeda, which he soon did.
 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.
Al Menbar National Islamic Society (Arabic: جمعية المنبر الوطني الإسلامي‎ ‎ , literally "Islamic National Tribune") is the political wing of the Al Eslah Society in Bahrain.
 A Sunni Islamic party, it is well organised through a network of mosques and seek to promote a conservative social agenda while not directly challenging the Kingdom's government.
 It become political society in 2006.
 Bahrain doesn't allow political parties by traditional definition.
 Before that it was merely a think tank and public affair society.
 Al Menbar won one seat in Bahrain's 2014 general election, down from two seats in 2010.
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.
Mullah Akhtar Mohammad Mansour (Pashto: اختر محمد منصور‎ ; or ;  1968 21 May 2016) was the Emir (leader) of the Taliban, an Islamic fundamentalist political movement in Afghanistan, from 29 July 2015 to 21 May 2016.
Hussain Rasheed Ahmed (Arabic: حسين رشيد أحمد‎ ‎ ; born March 18, 1957) is a Maldivian Sunni Islamic scholar (Shaafi'ee school of belief) and political leader in Republic of the Maldives.
 He is also the first elected President of Adhaalath Party (Adhaalath Party), a political party in the Republic of Maldives known for its Sunni Islamic positions.
Ibrahim Abu Mohamed (alternative spelling, Ibrahim Abu Mohammed) is an Egyptian-born and educated Sunni Islamic scholar and Grand Mufti of Australia since September 2011.
 As the spiritual leader of Australian Sunni Muslims the Grand Mufti holds the highest religious post for a Sunni Islamic scholar in Australia.
 The honorific his eminence is used in referring to Mohamed.
Taqlid or taqleed (Arabic تَقْليد "taqlīd") is an Islamic terminology denoting the conformity of one person to the teaching of another.
 The person who performs taqlid is termed "muqallid".
 The definite meaning of the term varies depending on context and age.
 Classical usage of the term differs between Sunni Islam and Shia Islam.
 Sunni Islamic usage designates the unjustified conformity of one person to the teaching of another, apart from justified conformity of layperson to the teaching of "mujtahid" (a person who is qualified for independent reasoning).
 Shia Islamic usage designates the general conformity of non-mujtahid to the teaching of mujitahid, and there is no negative connotation.
 In contemporary usage, especially in the context of Islamic reformism, it is often shed in a negative light, and translated as "blind imitation".
 This refers to the perceived stagnation of independent intellectual effort ("ijtihad") and uncritical imitation of traditional religious interpretation by the religious establishment in general.

Question: What Sunni Islamic fundamentalist political movement had a hand in the disillusionment of Nasser al-Bahri?
Answer: The Taliban