The whole chorus needs rewriting. Offensive to the religious, to Americans, to the disabled ("a broken man", indeed!), and I'm sure "privateer" is an insult. Let's try this:

Gosh darn them all! I was told
We'd cruise the seas for someone else's gold.
We'd fire no guns, shed no tears.
Now I'm bilateral BK on a Halifax pier,
The last of Barrett's privately commissioned warriors.