There are no athiests in foxholes. Many people rely on the Divine to survive. It doesn't matter that the enemy may be doing the same practice of praying and so forth when death is near. It doesn't matter that one side may be using the Divine as a rally cry. A lot of Axis and Allied Forces did a lot of praying in Normandy fighting in the French bocage but neither side was contesting each side's religious beliefs even though each side were murdering POWs for whatever reasons. As for Allah Akbar. That only goes so far. It is one thing to be brave before Allah and another thing when Allah's soldiers with AK47s run for their lives after keeping a Marine patrol pinned down until the Marines run low on ammo, had enough, and fix bayonets.