Mystery In Belgium
The short version is that rather than an anti-Semitic attack on a Jewish institution in which the particular people killed are randomly chosen this may have been a targeted killing or assassination, possibly tied to the Israeli security services. The big clue is this article by Amir Oren in Ha'aretz. The piece reads very vague. Oren notes the seeming professionalism of the killer, as revealed on surveillance videotapes of the crime. And he notes that the primary victims, Emmanuel and Mira Riva, were Israeli civil servants. Still, it's all very vague and speculative. But as Jeff Goldberg notes in a Facebook post, Oren's article reads like someone trying to say something within the confines of Israeli military censorship.
Richard Silverstein: Brussels Terror Attack and Mossad Connection