In war, the people in charge nearly always reference God during the "motivational" speech to the troops. The Generals urge the troops to fight with bravery, because, "God is on our side," or Allah, if your part of Al Queda. Or whoever you choose to worship; the name is irrelevent.
The idea is to motivate the troops by telling them that if God is with them, then they will fight harder, longer, stronger, better, etc. The troops will have less fear because they are on the side of righteousness.
But the enemy leaders are giving the same speech to their troops. Both sides can't be right, can they?
So, here's the question: If you were a soldier preparing for war, would a speech that references God/Allah/religion given by your commanders motivate you?
Using the war in the mid-east as an example, would you feel that you are on the "right" side if you were a U.S. soldier? What if you were an Iraqi or Al Queda?
Going back to WWII, would you feel that you a "right" if your were a Christian German soldier?