Arabia was idolatrous when, six centuries after Jesus, Muhammad introduced the worship of the God of Abraham, of Ishmael, of Moses, and Jesus. The Ariyans and some other sects had disturbed the tranquility of the east by agitating the question of the nature of the Father, the son, and the Holy Ghost. Muhammad declared that there was none but one God who had no father, no son and that the trinity imported the idea of idolatry.
War is a serious game in which a man risks his reputation, his troops, and his country. A sensible man will search himself to know whether or not he is fitted for the trade.
Men soon get tired of shedding their blood for the advantage of a few individuals, who think they amply reward the soldiers perils with the treasures they amass.