The Helpers

In 1990, a Canadian-born former Mossad caseworker named Victor Ostrovsky — expelled from the agency, writing with journalist Claire Hoy — published By Way of Deception. One of its most enduring ideas was the sayanim: a global corps of volunteer Jewish helpers who, Ostrovsky claimed, did unpaid logistical favors for Mossad officers abroad — lending apartments and cars, providing medical help, asking no questions — out of ideological loyalty. The book's framing held that the Mossad needed only about 35 field officers ("katsas") because this network filled the gaps: thousands of helpers, by some accounts tens or hundreds of thousands.

The sayanim remain one of the most cited and most contested concepts in the public image of the Mossad. This piece is honest historiography: what was claimed, who denied it, and what — if anything — is documented.

What Ostrovsky claimed

The core claims: sayanim are unpaid diaspora Jews who assist Mossad officers with non-violent logistics — safe houses, vehicles, doctor visits. They are not formally recruited, are told only fragments of any operation's purpose, and cooperate from loyalty to Israel. Ostrovsky also claimed these helpers were never told the risks — that, in his telling, the agency was essentially indifferent to what exposure might cost diaspora Jews.

That's the book's claim — not settled fact.

The rebuttals — and why they cut both ways

The pushback was immediate and heavyweight. Former Mossad directors, including Shabtai Shavit and Danny Yatom, categorically rejected Ostrovsky's account: he was a junior officer who never had access to the high-level operations he described. The official line: if such helpers exist, they're never asked to do anything illegal, and the network is nothing like what he described.

Israel's own conduct added a wrinkle. The government sued to block publication in the United States and Canada — and failed. States don't usually spend that kind of effort on pure fiction; but a censorship attempt doesn't validate the book either, only that the state considered it dangerous. My reading: Ostrovsky had some real exposure — enough to alarm the agency — without that proving any specific claim.

On the credibility ledger, at least one of Ostrovsky's specific claims — details of the 1988 Abu Jihad assassination — was later corroborated by Israeli sources after publication. That doesn't rescue the sayanim numbers; it complicates the dismissal. Honest verdict: partially credible on some matters, contested on others, unverifiable on the numbers.

What is actually documented

Strip away the mythologizing, and two sober facts remain.

First, intelligence services everywhere cultivate casual helpers — basic HUMINT practice, not a Mossad invention. The idea that Mossad uses informal logistical helpers is therefore unremarkable; what's remarkable is only the scale Ostrovsky asserted, which is precisely the part nobody can verify.

Second, there is at least one documented case of diaspora logistical support on a major Mossad operation: the 1960 Eichmann capture. The team in Buenos Aires turned to Luba Volk, a former El Al secretary living in the city, who arranged the logistics for getting an El Al plane — the cover for the exfiltration flight — into Argentina. A real volunteer helper, in a real operation. It proves the concept exists. It does not prove the army.

My assessment

The even-handed position, as honestly as I can state it: the sayanim concept is disputed, not settled. The general principle — diaspora Jews occasionally providing informal logistical help — is plausible, matches how every intelligence service works, and is partly documented. The specific claims — the numbers, the indifference to volunteers' safety, the vast secret army — rest on one contested source and are rejected by the institution he described. Neither side is proof. Anyone who tells you the sayanim are either a proven fact or a proven fiction is selling you certainty that doesn't exist.

The takeaway

When you encounter the sayanim in any Mossad story, ask three questions: who said it, who denies it, and which numbers are documented versus asserted? That's the smoke-vs.-solid test — and it's the whole brand.