Jeremy Corbyn has been accused of the same 'appeasement' as Neville Chamberlain
The warning follows yet another failure by the Labour leader to confirm he would push the button in retaliation to a nuclear attack on Britain.
During a recent leaders’ television debate, Mr Corbyn said: “The reality is we have to protect ourselves; we would not use it as first-use and if we would use it millions are going to die.”
Speaking last night Dr Igor Sutyagin, of the Royal United Services Institute, said that Jeremy Corbyn’s stance on Nato and Trident would embolden Russia to “pounce on his weakness”.
He said: “The key word is appeasement. Putin is a direct parallel to Hitler. He is opportunistic, he pounces on every weakness and he knows this brings success.
“Britain has historical experience of appeasing a powerful leader in Europe, and we all know where that led. Do we need to try it again? Wasn’t once enough?”
Mr Corbyn has failed to confirm whether or not he would push the nuclear button
Other experts warned his position makes it likely he would order “non retaliation” in his official Letters of Last Resort – written orders by a Prime Minister given to Trident submarine commanders to be opened in the event that the Government is wiped out during a nuclear attack.
His position destroys the idea of deterrence
Dr Igor Sutyagin of the RUSI
“The fact that Jeremy Corbyn thinks he would have the time to sit and discuss retaliating after a nuclear strike shows he has no concept of reality,” said Col Richard Kemp, former head of the Cabinet Office’s Cobra intelligence group.
“There is no doubt in my mind Jeremy Corbyn would order our Vanguard submarines not to retaliate. His position destroys the idea of deterrence.
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"By publicly stating he would not want to kill millions abroad he would, in fact, be deliberately risking the lives of millions here in Britain.”
The TV election debate – in pictures Wed, May 31, 2017
The televised debate saw Jeremy Corbyn, Amber Rudd, Paul Nuttall, Caroline Lucas, Angus Robertson, Tim Farron and Leanne Wood go toe-to-toe
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The politicians taking part in the debate
The Labour leader’s remarks come just three days after Putin’s defence minister Sergei Shoigu boasted that 99 per cent of his country’s ballistic missiles are on “combat-ready state”.
As well as his opposition to Trident, Corbyn has also threatened to diminish Britain’s role within Nato – the mainstay of Britain’s security since the Second World War.
During his leadership campaign he argued the Alliance should have been “wound up” after the Cold War, and indicated he may not honour Article 5, which obliges members to assist those who have been attacked.
He recently admitted he would risk a rift with Nato by refusing to honour the US request to deploy more troops in Afghanistan.
Boris Johnson said Mr Corbyn's comments on nuclear weapons 'spine-chilling'
Last month Anders Rassmussen, ex-Nato chief and Danish PM, told the Sunday Express that a victory by Corbyn would move Europe one step closer to war.
“It would put a question mark over Nato unity, Britain’s willingness to act in defence of its own interests, and Europe’s wider security,” he said.
“A firm hand on defence and security is essential if you want to avoid war and conflict. ” Former defence minister Sir Gerald Howarth said Corbyn would inflict damage to Britain’s Special Relationship with the US that would take “many years to heal”.
He said: “Corbyn embodies weakness, partly because of his extreme pacifism. The US would be very reluctant to share intelligence with a Corbyn-led government.”