The New York Times reported in March that Netanyahu had embraced the Mossad’s promise of a popular revolt when he urged Trump into the war, and had grown frustrated when no uprising came.
A leaked US National Intelligence Council assessment, compiled days before the first strikes, had already concluded that even a large-scale assault was unlikely to dislodge Iran’s military and clerical leadership, and that an opposition takeover was improbable.
It helps when a lot of the senior leadership gets killed off, including the assets.
It is also hard to revolt at the beginning of a war without being treated by the rest of the country as traitors.