its about difference isn't it , the difference between one set of people and another, one empire and another , its this difference that drives the bigotry and hatred which feeds war and religion is probably right up there as one of or even the biggest the biggest differences that divides people.
its been there all along in probably every war ever waged, back to ancient times and in Iraq and afghanistan today, its in the Balkans, its in Africa , its in the holy land ( is there a worse description of that place ever) its in politics, its everywhere ,doing what it does best dividing people up . even the so called atheist dictators killed people because of the "others" religion