Al Fadi and Jay Smith are challenging the Islamic traditional view which says that Mecca is where Islam started, Medina is where Mohammad migrated, and that the Quran was revealed during his time in both Mecca and Medina.  Also that the Quran was collected as a book  after the death of Mohammad by Abu Bakr and later by Othman in 652-654 AD.  Jay and Al ask the following questions:  Who is Mohammad? Did he really exist? And what do we know about Mecca? By doing so the are doing a historical critique of Islam.