If, however, they join the territory of a faction that has rebelled against Islamic law and assist them against the Muslims, they are to be fought in the same manner as that faction.
As for one who does not block the road but exacts protection money or a levy from travelers—on each person, animal, load, or the like—he is a trafficker (1) and an extortionate tax collector, and is subject to the punishment imposed on such tax collectors.
The jurists have differed over whether it is permissible to kill him. He is not considered a highway robber, since he does not render the road impassable. Nevertheless, he is among those who will suffer the severest punishment on the Day of Resurrection. The Prophet, peace and blessings be upon him, said concerning the woman of Ghāmid: “She has repented so sincerely that, had an extortionate tax collector repented in the same manner, he would have been forgiven” (2).
By consensus of the Muslims, those who are being wronged (3) and whose property is being sought may fight the armed brigands. They are not required to surrender any property to them (4) if they are able to fight them. The Prophet, peace and blessings be upon him, said: “Whoever is killed defending his property is a martyr; whoever is killed defending his life is a martyr; whoever is killed defending his religion is a martyr; and whoever is killed defending his family’s honor is a martyr” (5).