Don’t fool yourself thinking a dictatorship would remove only your enemies. Dictators, especially the ideological ones, repress more and more people until their partisans themselves end up purged, whether because of minor disagreements or power plays.
And dictators don’t ever think about residning since they love too much power and wealth and have done too much crimes they might have to answer for. Of course they can leave wilfully, if given enough impunity and their ill-gained wealth is protected.
He might have meant cultural splits, so that, for exemple, California, Dixieland, Deseret and New England, among others, might split.
There’s also the “getting offered total amnisty and some cash”, thought it had become a bit unpopular these times.