Why does Religion cause so much War?

United States
May 25, 2010 5:44am CST
Since the time of Moses, religion has caused many wars. The Crusades were thought to be fought as a Holy War, which also served as ethnic cleansing of infidels. Even now Muslim terrorists believe that God wants them to destroy non-believers by whatever means possible Why does religion cause so many wars? Wars really can be fought over ideals and different beliefs. If religion were to be eliminated would there still be as much war?