I personally do not believe there are squads of Jews running around Tehran blowing people up.
I do believe ALOT of money and tech is flowing to Iranian groups from somewhere. Could even be Saudi Arabia. Cheaper to assassinate than start a nuclear weapons program from scratch to defend yourself from Iran.
That or it is Big Jim McBob and Billy Sol Hurok doing all the blowin` up:
http://www.youtube.com/watch?v=KUtdXzBSVaU
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Not the Saudis. Why would they? They are exporting so much oil that every one of them is practically a millionaire. However, the Saudis may be giving monetary support.
Actually there are about 25,000-35,000 Persian Jews living in Iran, most live in Tehran. There are several synagogues in Tehran, Yusef Abad one of the most prominent.
Certainly possible for the Mossad to recruit a handful to assist with covert activities, though if I had to bet on it, I'd say the guys doing the most risky part of these jobs, the guys on the bikes planting the bombs, are probably just anti-regime Iranians wanting to do something to damage the regime's most precious nuclear program that maybe don't even realise that their operators are the Mossad.
Maybe, maybe not. There are plenty of formerly Iranian Jews in Israel who preserve their language and culture well enough to train covert operatives to blend in. I'd expect there are Mossad teams intimately involved in this effort, and I wish them God's blessings and great success.