Update: Nothing to do with Islam, eh?:
MB was established in accordance with [founder Hassan] al-Banna’s proclamation that Islam should be “given hegemony over all matters of life.” Toward that end, the Brotherhood seeks to establish an Islamic caliphate, or kingdom -- first spanning all of the present-day Muslim world, and eventually the entire globe. The organization further aspires to dismantle all non-Islamic governments wherever they currently exist, and to make Islamic Law (Shari’a) the sole basis of jurisprudence everywhere on earth. This purpose is encapsulated in the Brotherhood’s militant credo: “God is our objective, the Koran is our Constitution, the Prophet is our leader, struggle [jihad] is our way, and death for the sake of God is the highest of our aspirations.”Call me crazy, but it sounds like Islam is--how to say it?--at the crux of the thing.
Consistent with the foregoing credo, MB since its founding has supported the use of armed struggle, or jihad, against non-Muslim “infidels.” As al-Banna himself wrote: "Jihad is an obligation from Allah on every Muslim and cannot be ignored nor evaded." Added al-Banna: "It is the nature of Islam to dominate, not to be dominated, to impose its law on all nations and to extend its power to the entire planet."