The following meme has been floating around the interwebs, disseminated by the dregs of social media (hat tip: Spotlighting SA).
https://www.facebook.com/257654231023876/photos/a.257660834356549.56099.257654231023876/809240735865220/?type=3&theater
https://twitter.com/fascaso/status/657872155460411392
Umm no.
That is clearly former IDF Chief of General Staff Benn Gantz.
It looks like this story from the antisemitic Veterans Today site – written by their “Damascus Beaureau Chief” Nahed Al-Husaini (clearly a trustworthy, objective reporter) – may be the source.
http://www.veteranstoday.com/2015/10/19/breaking-israeli-general-commanding-isis-captured-in-iraq/
Except whoever created the meme did not get the memo.
As for “Yussi Elon Shahak”, he does not exist. Google his name. The only references to this high-ranking officer in the IDF are to antisemitic and loony tune sites.
Once again, the antisemites and Jew haters lie. Because truth (and justice) certainly is not on their side.