It is important to know what the songwriter is trying to say.

The same piece of writing can be interpreted in many different ways by many different readers.   I read this more as the wasteful slaughter of men by the powers that be against the views of objectors to war.

I believe that soldiers in an 'organised army' very rarely fight for a cause.   They are given a job to do and they fight for their mates who are all in the same position as them, nearly every act of bravery that I can think of involves soldiers putting themselves at risk for their comrades and not for their governments.

The song highlights the choice people can make about war and what the writer thinks, I don't see any mocking of the fallen.