The late Shaykh Ahmad bin Yahyaa an-Najmee (rahimahullaah) was asked: Some people claim that Bin Ladin is the awaited mahdee (leader) and they grant him the title “Chief of the Believers”. So what is your advice in this [matter]?
The Shaykh responded: These (ones) are the devils (shayaateen). They are the devils. Bin Ladin is a Shaytaan Khabeeth (a filthy devil), a Kharijite (a renegade revolter). It is not permissible for anyone to praise him. Anyone who praises him, then this is evidence that he is a Kharijite just like him … anyone who praises him, then this is evidence that he is a Kharijite just like him.
The view of orthodox Muslim scholars is that the contemporary groups characterized withextremism in takfir and jihad are “brethren of the devil” – they are those who have adopted the end result of the distillation of the ideologies of Vladimir Lenin, Alexis Carrell and Mawdudi taking place in the mind of Sayyid Qutb, subsequently expressed in his books, and then trying to justify these evil ideologies by drawing upon texts from the Qur’aan and the Sunnah.
It is obligatory upon all Muslims to warn from their evil and to banish them and their evil from the society, following the advice and guidance of the scholars in that for they are a calamity upon the Ummah.
Source ‘http://www.islamagainstextremism.com/articles/gnqfi-shaykh-ahmad-an-najmee-osama-bin-ladin-is-a-filthy-devil.cfm’>Shaykh Ahmad an-Najmee: Osama bin Ladin is a Filthy Devil</a>