To be honest, most of them do not even know how or when it was translated. I've actually heard KJV-Onlyists who believe that the King James who translated it was St. James the Apostle, the Bishop of Jerusalem! What's even more amazing is that they believe Middle Easterners 2,000 years ago knew English when English in its modern form did not even exist yet.
Mock them as you see fit. All the folks I was in church with as a kid could hand every person in my parish now, except one or two folks, their hat when it came to their knowledge and understanding of Scripture.
Melodist is a shining example of what happens when you have a brilliant marriage of Scriptural literacy and Orthodox theology. He is one of the few I would tap at my parish to argue Scripture with the KJV crowd.
You should read his blog. It is highly recommended.
You should suggest it to your Protestant friends, but don't tell then it is an Orthodox blog. Have them start at the beginning. Melodist doesn't go all Hyperdox.
He roots everything in Scripture and does a brilliant job of meticulously and economically making his points.
From the beginning:http://openthoumylips.blogspot.com/2011/07/first-of-many.html