In his Story of Civilization, Will Durant quotes William Summer, American socialist, who held that violent subjection was usually of a settled agricultural group by a tribe of hunters and herders. For agriculture teaches men pacific ways inures them to a prosaic routine, and exhausts them with the long day's toil; such men accumulate wealth, but they forget the arts and sentiments of war. The hunter and the herder, accustomed to danger and skilled in killing, look upon war as another form of the chase, and hardly more perilous; they look upon the ripe fields of the village with envy, they invent some plausible reason for attack, they invade, conquer, enslave and rule.

Invaders of India fall neatly in this category. Throughout its history the Indian subcontinent (encompassing modern-day Pakistan, India and Bangladesh) has been frequently subject to invasion, from the North-West by Central Asian nomadic tribes and the Persian Empire. With the fall of the Sassanids and the arrival of the Caliphates, these regions were integrated into Muslim dynasties of Central Asian heritage; initially Turkic people and later Mongol and Turco-Mongol people. Unlike earlier conquerors who assimilated into prevalent social systems, Muslim conquerors retained their Islamic identity and created legal and administrative systems that challenged and destroyed existing systems of social conduct, culture, religious practices, lifestyle and ethics. In fact, they barbarized the regions that they conquered.

Primitive man seems to have recognized no distinction in morals between eating men and eating other animals. "When I have slain an enemy," explained a Brazilian philosopher, "it is surely better to eat him than to let him waste ... The worst is not to be eaten, bur to die; if I am killed it is all the same whether my tribal enemy eats me or not. But I cold not think of any game that would taste better than he would.... You whites are really too dainty." To Montague it appeared more barbarous to torture a man to death than to roast and eat him after he was dead. We must pause and think how barbarous it is to torture and kill humans and how this comes so easily to barbarians whose religion is based on violence and teachings on how to kill animals barbarously.

This barbarism emanates from the Verse 111 of Chapter 9 Al-Taubah qouted below:

GOD has bought from the believers their lives and their money in exchange for Paradise. Thus, they fight in the cause of GOD, willing to kill and get killed. Such is His truthful pledge in the Torah, the Gospel, and the Quran - and who fulfills His pledge better than GOD? You shall rejoice in making such an exchange. This is the greatest triumph.