[link to original on tumblr]
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Why do we fight?These are the lyrics as they're rendered on the APP website, but because of homophones, that third line could also be written as "Why do we stand their backs against the wall?" "There" changes to "their," and "stand" becomes transitive where before it was intransitive, along with other shifts in syntactical function.
Why do we fall?
Why do we stand there, backs against the wall?
Why don't we change?
Why don't we try?
Why don't we turn round, help the other guy?
I think that - rendered that second way - it still makes sense within the song. Instead of asking "Why are we disengaged?" (or "inactive" or "passive" or whatever other word you want to use) it asks, "Why are we scrutinizing others?" which seems to be only a shade away from the first line in the verse ("Why do we fight?").