Jimmy Fallon criticised for 'humanising a monster' by messing up Donald Trump's hair on The Tonight Show

'I used to find Jimmy Fallon amusing. Now I'm conflicted'

Before Donald Trump appeared on Jimmy Fallon's The Tonight Show last night, the host was widely expected to mock the Presidential candidate.

However, during the segment, Fallon asked whether he could mess up Trump’s hair, to which - after seconds of deliberation - he agreed, allowing the Tonight Show host to ruffle his combover.

While intended to be funny, the segment was lambasted on Twitter, many accusing Fallon of ‘humanising’ the controversial figure and being ‘overly nice’ to him.

“Jimmy Fallon inviting Trump on is part of the normalising of hate,” wrote Mike Signorile. “Should be ashamed of himself. Lost all respect from me.”

Tweeters also questioned how Fallon’s house band The Roots were reacting to Trump appearing on the show, the band having so far not spoken about the guest slot.

London mayor Sadiq Khan recently spoke out against Trump, saying how the candidate is “playing into the hands of Isis.”

"Donald Trump said that Muslims from around the world - I'm paraphrasing - would not be welcome into the United States of America. Not only does that show a lack of understanding and awareness of the great country that is the USA and its history and legacy, it's also inadvertently playing into the hands of Daesh and so-called Isis because it implies it's not possible to be a Western liberal and mainstream Muslim.”

Trump previously said that London is so "radicalised" that there are areas where the Metropolitan police are "afraid for their lives".