I'm not sure, to me, Old Karen strikes me of definitely a foreigner and quite possibly a bot.
Although age-ripened naivete would fit, as she has been duped by The Babylon Bee years ago (until I hammered it into her that a story she posted from it was totally bogus), as well as believing fake Facebook stories and whatnot.
She's taken sarcasm from me as literal honesty. I once brought up how 'feller had posted what was my favorite meme on this site a decade ago, but then I had forgotten it was him and then found out when I dug it up once to show was somebody. So I'm saying about this, and I'm asking what happened to him, why did he change so radically and become so mean when he used to have fun? And she took it as so sweet of me, that I was complimenting him. Even after I pointed out that I was criticizing him, it just didn't seem to sink in with her.
It reminds me of the original Star Trek like when they would confuse an artificial intelligence robot and make it go tilt.