Religion provides a competitive advantage during combat, and should be supported even if you're not religious yourself. It's a fighting advantage we have over the Chinese and Russians. Most human specific traits can be traced to their competitive advantage during tribal warfare. Large brains, religion, speech, walking upright to carry weapons, having well-lubricated armpits that respond to stress, all were selected for on the battlefield. Based on archaeological evidence of religious items, the first tribe that discovered religion wiped out all the other competition. If atheist soldiers want to survive combat and be on the winning side, they should just suck it up and go along with the program as best they can.