The UK national anthem may be an instance of "God on our side" but it is not, in the three verses "usually" sung, about kicking Johnny Foreigner.

The third verse calls for blessings on the monarch and expresses the wish that he/she does the job properly.

The second verse, although sometimes said "to be sung in times of war," is a verse asking for protection against internal faction and strife. "Scatter his enemies" applied to Jacobites etc., with their knavish tricks and politicks. If the nation is at war, of course, then a wish to defeat the enemy might be a good thing.

As long as we have a monarch, "God save the king" is almost as p.c. as you could get.

But, just for the atheists:

Cheer for our gracious King
Health to our noble King
Long live the King.
Send him victorious,
Happy and glorious,
Long to reign over us,
Long live the King.

Let honest people rise,
Scatter his enemies
And make them fall.
Frustrate their knavish tricks,
Confound their politicks,
Peace in our land be fixed,
Union with all.

Let Earth's best gifts in store
For ever on him pour,
Long may he reign.
May he defend our laws,
And ever give us cause
To sing with heart and voice
God save the King.