It's worth pointing out that this is one person's allegation and that it is being made in the context of a retaliation complaint against an employer. Some of what is in the complaint doesn't make a lot of sense, for instance, if someone was actively engaged in espionage, why would they post restricted technical information to a public website 65 times?
The allegation that Dr. Gat was a spy seems to be sensationalism on the part of the Pasadena Star. One doesn't need to be a spy to violate ITAR.
The most substantial allegations against Dr. Gat are that he shared data with his adviser. It's quite easy to imagine a young researcher viewing ITAR as a dumb American law which inhibits collaboration, and deciding to continue sharing preprints and collaborating with colleagues abroad as though he were still in Israel. And why not? He doesn't seem to have been working on a project with obvious military potential, and is from an allied country. ITAR prosecutions against professors are extremely rare.
