-They thought the Portori were martyred during Malion's assassination in Moonfall.

The Cabalists were largely neutral: when Malion called on them for aid, Cabal adopted an isolationist policy, disquieted by his excesses. They did not seek the fall of the Protectorate but thought they were best positioned to assume power after Malion and the Rebels were both gone.

They didn't expect the Rebels to win, but DO see the advantages to free minds and frwe choices.