Ministers face demands to cancel Donald Trump's State Visit today after the US president retweeted videos posted by a far-right UK group.
MPs insisted Mr Trump was 'not welcome here' in the wake of the Twitter posts, while the widow of murdered politician Jo Cox accused him of 'spreading hatred'.
The furious backlash came after Mr Trump retweeted content posted by Jayda Fransen, the deputy leader of Britain First, which campaigns against the spread of Islam.
Mrs Cox was stabbed and shot outside her constituency offer by a man who shouted 'Britain First'.
The first video purportedly shows a 'Muslim migrant' beating up a Dutch boy on crutches.
Mr Trump also retweeted a video of a Muslim man 'destroying a statue of Virgin Mary', and another where Fransen wrote, 'Islamist mob pushed teenage boy off roof and beats him to death!'
The provenance of the footage is unknown.
Brendan Cox, whose wife Jo was killed during the EU referendum campaign last year, said: 'Trump has legitimized the far right in his own country, now he's trying to do it in ours.
'Spreading hatred has consequences & the President should be ashamed of himself.'
Labour MP Mary Creagh posted: 'Jo Cox's killer shouted 'Britain First'. (Trump) retweeting this hate criminal demeans his office. He is not welcome here.'
London Mayor Sadiq Khan, who was embroiled in a spat with Mr Trump over his call for a travel ban on mainly-Muslim countries, said: Britain first is a vile, hate-fueled organisation whose views should be condemned, not amplified.'
Last year, Fransen was found guilty of religiously aggravated harassment after accosting a Muslim woman.
Fransen admitted that she told Sharpe, who was wearing hijab, that Muslim men force women to cover up to avoid rape 'because they cannot control their sexual urges.'
Sharpe was in front of her four children at the time.
Read more at dailymail.co.uk