The Jesuits, at least according to the Protocols, were the greatest threat the Synagogue of Satan faced, and apparently they were exposing jews as late as the early 20th century. It would be bizzare for them to be jews themselves, unless they were all Johannes Pefferkorn types, and you generally only get *one* of those every century. Remember, one of the primary means of slander the jew will employ is accusing you of being *him*.