Firstly in no sense is it a hymn. It was first sung by the Drury Lane players in 1745 as the Jacobite armies were advancing on London. The fourth verse that nobody has sung for donkey's years contained a plea to the Almighty to "crush native Scots".
How can such an 18th-century xenophobic ditty be in any way seen as either Christian or National?
JAMES SAMUEL COLE
Neath, West Glamorgan