"When a believer sees that someone is trying to obstruct another believer from travelling on the road that leads to God, spirit of Jihād requires that such a man…be prevented from doing so and the obstacles…be removed, so that mankind may freely be able to negotiate its own path that leads to Heaven. To omit to do this is a culpable omission, if only because we…become passive spectators of the…forces imposing a blockade in the way of those who mean to keep their faith with God. Then ordinary wars which mankind has been fighting for…revenge or securing satisfaction of their desire of getting more land or more booty are not allowed in Islam. This is so because here the rule is, all striving must be for the sake of God….The wars in the theory of Islamic law are in the nature of an undertaking to advance God’s purpose on earth, and invariably they are defensive in character... It is a duty of a believer to carry forward the Message of God and to bring it to the notice of his fellow-men in handsome ways. But if someone attempts to obstruct him from doing so he is entitled, as a measure of defense, to “retaliate.” In other words, a Muslim has the right to fight anyone who stops him for spreading Islam and its message, and that is defined as a defensive measure.... In Islam war is waged to establish supremacy of the Lord only when every other argument has failed to convince those who reject His Will and work against the very purpose of the creation of mankind. Indeed, the person who goes to holy war virtually is offering testimony regarding the paramountcy and supreme authority of God’s law by giving up the most precious thing he has, namely, his life….Indeed the very word “Shahīd” which is roughly taken to mean as a martyr, literally signifies the idea that he has borne testimony as a witness that God’s law is supreme and anyone who attempts to obstruct the progress of those who are taking their path to God will be dealt with sternly—for that is the only way in which to restore and rehabilitate the authority of God on Earth... Many Western Scholars have pointed their accusing fingers at some of the…verses in the Qur’an….As to them it is sufficient answer to make…that the defiance of God’s authority by one who is His slave exposes that slave to the risk of being held guilty of treason and such a one, in the perspective of Islamic law, is indeed to be treated as a sort of…cancerous growth on that organism of humanity….It thus becomes necessary to remove the cancerous malformation even if it be by surgical means (if it would not respond to other treatment), in order to save the rest of Humanity."