I'm not sure that I believe entirely in the history behind the link provided by the OP. After a quick look, I see that the author cites Montaigne's "On Cannibalism" (quite easily accessible online) to prove that it was a real practice in Early Modern Europe, but, if you're familiar with the work, you'll see that Montaigne only speaks about what some Ancient Greek philosophers might have said to make an argument for cultural relativism. IMO the article looks like a mishmash of different anedoctes from different periods trying really hard to make a barely believable narrative.