This, and the New York Daily News article linked, are whooshes, right? Something about the linked article doesn’t pass the sniff test. (But, that could be said about a whole lot of N Y Daily News articles, no?)
Lots of newspaper articles are dated the day before.
I don’t know of any Church historian or Arthurian scholar who has ever said that there was a real Grail cult. (I would almost say “real Grail”, except that, obviously, there must have been some cup used at the Last Supper, whether it was preserved or not.) This story just goes against everything I know on the subject, and requires a great many unrelated facts to be suddenly and simultaneously turned on their heads.
Were innkeepers in the habit of using onyx dinnerware back then?
"And he took a cup, and gave thanks, then took another look at the cup and said “Verily I say unto you, I knoweth not who arranged this shindig, but I am not paying extra for this.”