The detail that leaps out at me is the alleged method of assassination: electrocution and suffocation. Then this from Haaretz:
The bits of information and the camera images suggest methods used by the Mossad that Mishka Ben-David wrote about in detail in his novel “Duet in Beirut.” Ben-David, who served as the intelligence officer for the Caesarea operations branch of the Mossad, insists that his novel is a work of fiction. However, it is obvious to all that the experience he accumulated in the Mossad over the years appears in his book.
“Duet in Beirut” is very similar to the failed attempt in 1997 to assassinate Hamas politburo chief Khaled Meshal in Jordan. Ben-David describes the Mossad agents changing hotels, changing vehicles, arriving from different destinations, and changing clothes and appearances in order to make identification difficult.
If you want some idea of the imploding ship of the WaPo, they have a Reuters wire story that you have to a search to find.