Well i think all this recent hype in the news about osama and his friends is for the american public in order to win the upcoming elections. and partly an effort by the Musharraf Govt. to win little bit of favours from americans.
According to Professor Abdullah Saeed, the key difference between the Muslim Brotherhood and al-Qaeda is that the former are "neo-revivalists" who claim the right to create their own scriptural interpretations while the latter are "traditionalists" who regard classical interpretation as authoritative. Thus, although the MB's interpretation is a relatively militant and strict one, it has major doctrinal differences with al-Qaeda, as illustrated by Zarqawi's condemination of its theology as "mercurial."
That would also appear to explain bin Laden's frequent citing medieval theologians like Ibn Taymiyyah as well as for contemporary figures like Sayyid Qutb or Abdullah Azzam.