And he claimed that Sinn Fein's strategy had moved "from the bomb and to the bedroom" - in an attempt to create a nationalist majority in Northern Ireland.
Oh dear, oh dear.
Breed the Brit barstewards out of Ireland, how very 1970s ethno-nat and not really the kind of cuddly civic, secular nationalism we've come to expect from the "modern" SNP.
Mr Hirst argued demographic changes meant there would be a nationalist majority in Northern Ireland within a short period.
A baby is not born with its political affiliation already mapped out for it. But I think Mr Hirst is hinting at something a bit more base here; not so much a "breed the British barstewards out of Ireland" then; more a "breed the Prod barstewarts out of Ulster".
Northern Ireland's population would within a "relatively short" time, have nationalist majority, he said.
Population or voting electorate? If it's the former, how is he measuring the size of that "nationalist" population? Guess.
"The clock is ticking away in their favour and the current political process and institutions in the North, which are and remain deeply flawed, are only being maintained to ensure a smooth political transition to the point where a majority nationalist and republican government can call a referendum on reunification and the children being produced now in their communities endorse that peacefully," he said.
Brilliant, even Sinn Fein aren't that crudely ethno-nationalist anymore (at least, not in public).
He said the "ultimate letting go" of Ulster by Britain was likely to coincide with the point where Scotland finally reached out for "her national freedom also".
What "keeps" Northern Ireland British?
The will of the majority of its citizens.
It therefore won't be up to "Britain", or indeed SNP aides, to let "Ulster" go.
But apart from all that...yes, very good work Mr Hirst.