Sayanim are ordinary Jews living outside Israel (often with dual passports) who put the considerations of Israel (over the USA) during false flags, assassinations, etc.
The Sayanim mostly act legally though sometimes they may perform illegal acts like forge documents hide criminals, etc.
Sayanim are shielded from conventional legal culpability by being told only enough to perform their narrow role.
Though their help may be essential to the success of an Israeli operation, Sayanim pass polygraph tests because their recruiters ensure they remain ignorant of the overall goals of an operation.
SAYANIM ARE INDISPENSABLE IN FALSE FLAGS AND MOSSAD ASSASSINATIONS