“They are totally contrary to previous assertions regarding the Government’s commitment to the backstop,” she said.
“The Taoiseach has consistently ruled out a border poll on Irish unity. Today he paints a doomsday scenario of a return of soldiers to the border in the event of a no-deal Brexit.
“If that is the case then the only way to prevent such a scenario is by affording the Irish people their say in the form of a border poll on Irish unity.”
A Government spokesman issued a statement after the interview to clarify that Mr Varadkar was not referring to the Irish Army.
The Irish Government has no plans to deploy infrastructure or personnel at the border
“The Taoiseach made it clear in the interview that the Government is determined to avoid a no-deal scenario and the consequent risk of a hard border,” the spokesman said.
“He was asked to describe a hard border, and gave a description of what it used to look like, and the risk of what it could look like in the worst-case scenario.
“He was not referring to Irish personnel and the Irish Government has no plans to deploy infrastructure or personnel at the border.”
The picture became further confused later on Friday when a senior Fine Gael politician indicated that Irish troops could be deployed to the border in the event of a crash-out Brexit.
When asked whether British or Irish troops would have to serve on the border in a worst-case scenario, Fine Gael senator and Brexit spokesman Neale Richmond said “probably both”.
He told BBC Radio Ulster: “International obligations could see both the British and Irish governments forced to put customs posts and those custom posts might need to be protected by armed guards. That is something that is the worst-case scenario.
“And unfortunately if we do allow the no-deal crash-out eventuality go to the worst-case scenario, that’s what we are looking at.
“People need to be fully aware when politicians or advocates go around saying ‘it will be fine, there is a managed no deal’ – there isn’t, there are consequences.”
Mr Varadkar also said Ireland is being victimised in the Brexit process and the government would not be giving up on the backstop mechanism for promises that the border issue would be rectified at a later date.
It comes as the clock ticks down to the March 29 deadline for the withdrawal of the UK from the EU.
People who say they're against a hard border and also against a backstop - that's a contradiction.
“The problem with that in the context of Irish politics and history is that those things become targets, and we’ve already had a certain degree of violence in the last few weeks.”
He said Brexit discussions had been dominated by speculation on its potential impact on trade and the economy, but that for Ireland it was about ensuring continued peace on the island and that the progress made in 20 years since the Good Friday Agreement was not lost.
He said that Ireland had already compromised in the Brexit negotiations and that the withdrawal of the UK from the EU was potentially going to cause a lot of harm to other countries.
“We’re the ones already giving,” Mr Varadkar said.
“The UK wanted a review clause in the backstop and we agreed to that, the UK wanted a UK-wide element, so why is it the country that is being victimised is the one that’s always asked to give?”
The Taoiseach said he had not yet seen any technologies that could ensure that no hard border emerged between Ireland and Northern Ireland.
“They don’t exist and nobody has been able to show them to me,” he said.
“Why would we give up a legal guarantee and something we know will work in practice for a promise to sort it out later, or a promise to invent technologies? That’s just not a serious position.”
He added that Brexiteers who were against the backstop, but also claimed that they were against a hard border, were being contradictory.
“People who say they’re against a hard border and also against a backstop – that’s a contradiction,” he said.
Speaking from Davos where he is attending the World Economic Forum, Mr Varadkar said it was “very unlikely” that Brexit would not happen at all.
He said Ireland and the EU had already made concessions and that they would continue to “help” move the impasse forward.
“We could work with a Norway-plus model. We could work with a Canada-model with special arrangements for Northern Ireland,” Mr Varadkar said.