The right answer of course, is none of the above
The obvious intention and message of this short story is to show the reader "The other face of war" this meaning that in every fight there has to be one loser and one winner; reminding the fact that for the winner to feel satisfaction for the victory there has to be a loser who cries for defeat.
The author points out the irrational fact, that people pray for god to let their soldiers to kill and not to be killed, whereas, god should be asked for blessings.
It is necessary to point out as well that the misterious preacher also states that when people pray for US soldiers to come back alive, they are automatically praying for the enemy to be killed.
Mothers who thank god for bringing their sons back alive, mean at the same, time mothers who shall mourn sons who never did.