The Latter Day Saints aren't the only ones to take traditional hymns and alter them. The Seventh-Day Adventists and Jehovah's Witnesses and Christian Scientists have made drastic alterations to hymns to fit their doctrine; and Catholics and various Protestants have done the same. I guess since all the various Christian denominations have shades of difference in their beliefs, it's probably right that they tailor the lyrics of their worship songs. The LDS and SDA's and JW's and Christian Scientists make changes that are more drastic than most - to the point where I don't bother collecting their hymnals, since they rarely have lyrics I can trust to be original. I'm wary of songs in Unitarian hymnals, too.
Damn revisionists...
-Joe Offer-