Love this song. I can even overlook the God/Christendom/men lyrics by mentally translating them. If you sing it, you can change the lyrics too:
"God is not dead, nor doth She sleep . . . "
"Peace on earth, goodwill to all."
The poem was written in 1864 by Henry Wadsworth Longfellow during the Civil War, according to Wikipedia. It's still as moving as it ever was.