“In fact, Muslims are obligated to raid the lands of the infidels, occupy them, and exchange their systems of governance for an Islamic system, barring any practice that contradicts the sharia from being publicly voiced among the people, as was the case at the dawn of Islam... Thus they make claims and speak about Allah without understanding. They say that our sharia does not impose our particular beliefs upon others; this is a false assertion. For it is, in fact, part of our religion to impose our particular beliefs upon others. Whoever doubts this, let him turn to the deeds of the Companions [of Mohamed] when they raided the lands of the Christians and Omar imposed upon them the conditions of dhimmi[tude]... Let the signatories review them so they know that we are to force people by the power of the sword to [our] particular understandings, customs, and conditions, all in order to induce debasement and humility, just like Allah commanded when he said: "[...] until they pay the jizya by hand, in complete submission and humility." [Koran 9:29] Now, if you are incapable of jihad and placing people into the religion, like the Companions did, your impotence does not mean that it is not a legitimate aspect of the religion.”
Source: Raymond Ibrahim: The Al Qaeda Reader (pp. 50-51).