Please gentlemen, Mossad is in mourning today.
https://uk.news.yahoo.com/israel-rev...4.html#1NvbZhs
According to Reuters, this biographical detail had been previously withheld to minimize the risks that Sotloff's captivity already engendered. Sotloff also seemed to have successfully hidden his Jewish faith from his captors :
The Israeli newspaper Yedioth Ahronoth, quoting a former fellow captive, said Sotloff had kept his Judaism a secret from the Islamist insurgents, pretending he was sick when he fasted for the Yom Kippur holiday."
The Times of Israel is reporting that Sotloff had emigrated to Israel in 2005 becoming a citizen and attending school there before he started his career in MOSSAD.
I doubt secret remained hidden.
