Translation: "Shit! It might be me next!". Which for someone who is only too happy to whip up a mob on Twitter against whoever it pleases him, is quite the revelation.
Although this is not 'censorship', as the increasingly-unhinged wordsmith would have it. The government isn't stifling Allen. The mob is.
The rights to the book will now return to Allen.It'll be interesting to see what happens next. Will he find another publisher? Will he self-publish?