In 2000 , he issued a fatwa endorsing the use of suicide bombings against Israel , and in 2001 he supported the destruction of the Buddhas of Bamiyan by the Taliban . Al-Alwan ’s mosque in Al-Qassim Province was criticised by moderate Islamic clerics as a " terrorist factory " . Among his students was Abdulaziz al-Omari , one of the plane hijackers in the September 11 attacks . After the September 11 attacks , Al-Alwan issued two fatwas ( 21 September 2001 and 19 October 2001 ) , in which he declared that any Muslim who supported the Americans in Afghanistan was an infidel , and called on all Muslims to support the Afghans and Taliban by any means , including jihad . In January 2002 , Alwan and two other radical Saudi clerics , Hamoud al-Aqla al-Shuebi and Ali al-Khudair , wrote a letter to Taliban leader Mullah Omar praising him and referred to him as the Commander of the faithful
September 11 attacks
September 11 attacks
Sulaiman Al-Alwan