I’ve read about that. Sad that this is what it’s lead to.
Hasidic Jews or any inbred group has the same problem. It is really sad, because most of the Amish are fine and pleasant (although you have to check prices if you’re buying or contracting with them, because they’re a bit on the sharp side).
I remember when I went to buy preserves and produce one time and I got to talking with one of the women. She was about 40, really nice, had 11 children (!) and took me down to the cellar to show me her preserves and stored and canned (jarred) veggies, as well as the bacon and ham they had from the slaughter. It was impressive!