Shadow Chancellor John McDonnell called Winston Churchill "bad guy", provoking Boris Johnson's furious reprimand.

The Labor heavyweight commented on the manner in which Mr. Churchill treated the striking German miners while he was secretary at home in 1910.

Churchill's decision to send troops to help police crack down on riots in Tonypandy has long been the subject of historical debate.

During a question-and-answer session on the Politico website, Mr. McDonnell was asked about "Winston Churchill, hero or villain?"

The Chancellor of the Shadow said: "Tonypandy – naughty."

Mr. Churchill ordered 200 police officers from the Metropolitan Police to enter Tonypandy, with a detachment of Lancashire Fusiliers in reserve at Cardiff.

The soldiers were eventually called to the Rhondda Valley village to help them cope with the situation.

The warlord, who was later knighted, was voted Britain's biggest in a 2002 BBC poll.

Former Foreign Minister Johnson, who has written extensively on Churchill, said McDonnell should be "ashamed" of what he said.

"Winston Churchill has saved this country and all of Europe from a fascist and barbaric racist tyranny and our debt to him is incalculable," he tweeted.

"If John McDonnell had any knowledge of history, he would be aware of the fact that Churchill also had an extraordinary record as a social reformer, who cared deeply about the workers and their lives.

"JM should be ashamed of his words and remove them immediately."

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Conservative MP Sir Nicholas Soames, grandson of the former Conservative prime minister, told the Daily Telegraph: "It's really a very stupid and stupid thing to say, surely to advertise.

"I think my grandfather's reputation can withstand an attack in search of publicity from a third party, Lenin Poundland, I do not think it will shake the world."

Labor MP Ian Austin said he disagreed with McDonnell's comments by posting a social media image of a warlord figurine he keeps at home.

Mr. Austin tweeted: "Look who occupies a prominent place on my chimney in Dudley: a true British hero, the greatest British of all time, the man who motivated Britain to defeat the Nazis and to fight not only for our freedom, but also for the world. "

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