As has been said, the songs should stand as works in their own right, regardless of the sentiment - The West's Awake is perhaps my favourite, even though I do not subscribe to the view that England should quake.

An example of the opposite is The Foggy Dew - mawkish doggerel sung to a turgid march tune, but which seems to be hailed and heralded because it supports the "cause".

cheers, Terry