Is that by attacking the muslim lands, the muslim has an obligation to god to defend it from faslehood. By awakening the believers in Islam they will enjoin what Allah the most high has enjoined and forbid what he has forbidden, prefer the next life to this, and will once again struggle with their lives and wealth to bring themselves and others out of the oppression of man made ways of life to the justice of that which has been revealed by the all knowing creator!
One of the companions of the prophet Muhammad(may peace and blessings of Allah be upon him) Rab’ia ibn Amer, went to meet Rostrum, the famous Persian general, at his request and the general offered camels, and women and asked them to return to the desert. Rab’ia refused, and Rostrum asked him why then were they fighting. Rab’ia replied: “We have come to take mankind from the darkness to the light and from the worship of the false gods to the worship of Allah, from the narrowness of this world the wide expanse of this world and the next, and from the injustices of man made religions to the justice of Islam.”
Another companion named Khalid Bin Waleed, said in response to a Roman letter inviting him to surrender: “We have with us people who love death as you love wine.” It was Ronald Reagan who quite rightly pointed out that: “How do you expect to defeat a people who believe that when you kill them they go to a paradise filled with beautiful virgins and rivers of wine?”