Islam through Averroes, has been conceived as a myth designed to keep the people quiet. The scholars could quietly let the caliphs and the imams rule if the intelligentsia were left free to pursue philosophy, which was conceived to be anti-Koranic in the sense that the Koran did not hold up under scrutiny about its claims. The fragility of Islam, as I see it, lies in a sudden realization of the ambiguity of the text of the Koran. Is it what it claims to be? Islam is weak militarily. It is strong in social cohesion, often using severe moral and physical sanctions. But the grounding and unity of its basic document are highly suspect. Once this becomes clear, Islam may be as fragile as communism.
Link (here) to Spengler's commentary on Fr. Schall's piece