Most Ismailis viewed the Fatimids as their spiritual and political leaders and their claim was made over the Muslim world; the majority of Muslims at the time rejected that claim.
The manifesto of Baghdad is the testimony given by a number of Muslim Sunni and Twelver Shiite genealogists and law scholars known all across the Islamic world in 402/1011, doubting the Alid lineage of the Fatimids, they were declared to be descended from a Jew by the name of Ibn al-Qaddah, A Munafiq/Hypocrite, which meant that the Fatimid dynasty was traced back to a Jew, a supposed enemy of the faith, instead of the Ahl al-Bayt (family of the Muhammad), which was the basic justification for the claim of sanctity of the Fàtimid rulers in the Ismaili doctrine.
The statement that was ordered by Al-Qàdir to stop the spread of Ismailism within the very seat of his realm was long debated; among those who signed it were Ibn Razzam and Ibn Nadim.
Threatened by a possible rebellion within his empire, the Abbasid caliph asked esteemed scholars and jurists to issue an edict claiming that the Fatimids were not descended from Ali. With this, he intended to delegitimize the Ismaili allegiance to the rival Fatimid domain on the basis of their claimed descent.