As far as I can tell, the majority of wars are based on greed, power, and ownership. Religion may be used by those in power to control the minions who'll be sent off to their death in many cases.

But you get plenty of wars not about religion. Rather difference. Difference in religion may count in this, but it doesn't have to be religion. It can also be race, culture, political beliefs. Like at the Vietnam and Korean wars. Look at Afganstan. If the difference is religion, it doesn't mean Religion caused the war, but human's tendancy to stereotype, and discriminate. Also the desire for more land, or property. Like the recent invasion of Georgia by Russia. Or, as many people claim/think, the US going into Iraq for oil (Im not saying this is my view, but its definately many people's).

Much of Britian's conquering of the world was about an Empire. Not really about religion. Of course the Brits thought they had the right religion, but they weren't only targeting those of other faith. Britian has a huge conflict history with France, both Christian countries.

WW2 was about race, and making German great again (when Hitler did what he did), and then turned into full out war from German aggression at the invasion of Poland because Britain couldn't turn a blind eye anymore. America mostly joined in because of the bombing of Pearl Habour, that's barely about religion.

Then you get tribes in Africa who hack each other to death, just because they are different. Also in the orient, there were fuedal (sp) wars, basically between clans for power, land and money. Religion wasn't interlinked with this at all.

Israel and Palestine is vaguely about religion. The Jewish people feel its their God given land, but for the Palestinians, isnt it more about they were already there and their home was basically given away by the Western Powers?