Islamic intellectual history already contains every claim native informers recycle as new

Evidence

Neither discussion of the Judaic roots of Islam nor the association of both these world religions with various messianic movements in the region is new or revolutionary. The figure of Abdullah ibn Saba, a Jewish convert to Islam, for example, has always been affiliated with the rise of the Shi’i branch of Islam, by far the most messianic tendency evident in the faith. There is no blasphemy Ibn Warraq can produce that does not already have a long and rather varied Islamic social and intellectual history. The problem with the Orientalist mummies he brings back to life is their ignorance of their own obsolescence—except to the bewildered American generals who keep inviting Bernard Lewis to advise them on empire building. — Hamid Dabashi, Brown Skin, White Masks, 483