Robert Worth: How could you????

I was reading the piece by Robert Worth this morning and then I encountered this passage: "Mr. Mabhouh played a role in the kidnapping and killing of two Israeli soldiers in 1989, and was involved in supplying Iranian weapons to Hamas." I mean, this passage is even worse than the propaganda that fills dispatches by Kershner and Bronner. Usually, the last two quote non-stop Israeli military and intelligence propagandists, and tell you that they are citing them. You, on the other hand, cited an unverified Israeli intelligence propaganda claim WITHOUT giving the source to the reader. How did you know that to be true, Robert? How? Was he accused and convicted? Or is this public knowledge? You owe your readers an explanation.