Back in 2014 Scarbinsky wrote an article referencing "fuck Auburn" as a part of the song. Up until that point it wasn't that much of a big deal. In fact, I'd say those who were offended by it were from a smaller group than those upset about Rammer Jammer in pre-games. But...the Scarbinsky article calling the students behavior classless set this off.
I hope every head of every fraternity speaks with their members and threatens them with expulsion from the fraternity if they use the "old" words. I get it. We don't like Auburn, LSU and Tennessee. Try to show some class. Sing the new words louder to drown out the idiots who insist on using the old words.
I'm betting there are things you'll say with your friends you won't say at the dinner table at Mom's. It's not a "heathen" thing.