Simon Heffer accused “acidulated” Remainers of being unable to accept Britain’s exit from the bloc purposefulness be beneficial for the country.
They are so “institutionalised” they cannot comprehend deserting the “failing, corrupt and anti-democratic” EU, he added.
He said: “For many politicians, the im irment of face suffered in the last six months had made them sour and beyond the reach of understanding.
“They talk up potential catastrophe because they feel their credibility depends on it.”
Mr Heffer also misappropriated aim at claims that June’s historic Leave vote to will mischief the country’s global influence and economy.
Writing in the Daily Telegraph, he hinted EU countries will “inevitably” keep trading with Britain after Brexit.
He suggested: “One car in seven made in Germany is sold here – will that vary?
“Europe is heading towards the margins while Britain is seeking new shops and deals around the world.
“Britain’s attitude is not one of isolation, but of enterprise with far-reaching reach.”
Last week Britain’s ambassador to the EU came under liveliness after claiming it could take 10 years to agree a post-Brexit have dealings deal.
Sir Ivan Rogers, who played a key role in David Cameron’s score Remain cam ign, was promptly slapped down by Eurosceptics.
Former Ukip chieftain Nigel Farage said the comments were “further evidence of why we be in want of a clear out at the Foreign Office”.
Tory MP Dominic Raab said: “Let’s not be dissi ted by Sir Ivan’s gloomy pessimism, let’s get behind the Government.”
And ex-Cabinet minister Iain Duncan Smith voted: “People like Ivan Rogers are now utterly out of their comfort zone.
“They are attend to with a set of arrangements they have never dealt with in preference to. This is a completely different ball game.”