Labour MP David Lammy has defended comparing Jacob-Rees Mogg and Boris Johnson to Nazis - saying his comments weren't "strong enough".
Mr Lammy, who supports a second referendum on Britain leaving the EU, defended his comments while being questioned by Andrew Marr on BBC One.
He said the behaviour of Jacob Rees-Mogg retweeting content from the far-right Alternative for Germany and of Boris Johnson meeting Donald Trump's advisor Steve Bannon justified the comparison.
Mr Lammy was asked about whether a comparison he previously made between the European Research Group (ERG) and the Nazi Party and South African racists was unacceptable.
He replied: "Andrew, I would say that that wasn't strong enough.
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"In 1938 there were allies who hatched a plan for Hitler to annex part of Czechoslovakia, and Churchill said no, and he stood alone.
"We must not appease. We're in a situation now, and let me just be clear, I'm an ethnic minority.
"We have, in the ERG, in Jacob Rees-Mogg, someone who is happy to put on to his web pages the horrible, racist AfD party, a party that's Islamophobic and on the far right.'
He added: "The BBC should not allow this extreme hard-right fascism to flourish."
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Reminded that those he was decrying were Brexiteers were elected by the public, Mr Lammy said: 'I don't care how elected they were, so were the far right in Germany.
"British soldiers in this country died fighting this thuggery and extremism and here we are in 2019 with people bringing it into the mainstream for their political advantage."
But one Conservative MP said he went too far.
Conservative MP Conor Burns tweeted: "I used to have regard for David Lammy . But this is bats**t. Comparing ERG to Hitler is quite something. Fully lost it."
