[simias]

I don't think it's weird, in fact I think it's very interesting and telling of the world we live in. After all you could make the same argument for the Bible in Latin, why did the catholic church stick with it up until less than a century ago? And let's not even mention the Quran or Vedic Sanskrit.

The USA is now the world's superpower, English is its language and it's become the de-facto lingua franca of the world, a new Latin. But all that is fresh and new, in the grand scheme of things. Religions and cultures call for relics, for heritage, for proofs that there's something greater than a sum of people living in the same place at the same time.

The King James Bible is one of these artifacts. It's the one true bible for our Anglocentric world and like the Latin of the catholic church it's probably going to outlive the language it's been written in by a long margin (unless of course the USA manage to collapse before that and some other civilization takes over).

Besides that, there's clearly a certain fascination for overly formal and/or outdated English in the American psyche. Look at how Received Pronunciation is so popular in American media (especially in fantasy, but not only) even though it's effectively only used by a small minority of mostly British and Indian speakers.