Fox News's Jesse Watters may have been trolled by a famous YouTuber who he thought was a leader of an anti-fascist group called Antifa.

On Saturday's episode of Watters World, Watters introduced his audience to a man who he said was a member of the Boston branch of Antifa - a group that has caused violence in clashes against counter-protesting right-wing or 'alt-right' factions.

The Antifa collective is a somewhat small group in the scheme of anti-government protests since January 20, but the organization made headlines after lighting cars on fire in Washington, DC on the day of the inauguration.

Watters's guest 'Kevin' took credit for an anonymous letter that was published by an Antifa member earlier this month that called on liberals to cause violence.

On Saturday's episode of Watters World, Watters introduced his audience to a man who he said was a member of the Boston branch of Antifa - a group that has caused violence in clashes against counter-protesting right-wing or 'alt-right' factions. The man he spoke to was actually a famous YouTuber

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The letter said: 'It is time for liberals and progressives to lose their illusions about the anarchist movement and our tactics because, quite frankly, you have no one else willing to fight for you.'

After Watters' clip on antifa aired, it was revealed that 'Kevin' is actually a famous YouTuber named BG Kumbi, who uploaded the video to his channel under the 'comedy' category, calling it his 'Fox News debut'.

Exactly one month before the interview with Watters took place, Kumbi announced that he would join Antifa in what appears to be another satirical YouTube video.

Commenters wrote messages on the Fox News clip that he uploaded, including 'I never knew kumbi could troll on this level,' and 'this is actually real lmao'.

Kumbi's real identity was also mentioned by alt-right social media figure Mike Cernovich, who called him a 'notorious troll'.

After Watters' clip on antifa aired, it was revealed that 'Kevin' is actually a famous YouTuber named BG Kumbi, who uploaded the video to his channel under the 'comedy' category, calling it his 'Fox News debut'

Kumbi's real identity was also mentioned by alt-right social media figure Mike Cernovich, who called him a 'notorious troll'.

In the clip on Watters's show, the host asked Kumbi about his alleged call for more violence.

Kumbi said that the violence was self defense from 'racists and xenophobes' that 'attack' him and his group at protests.

He blamed 'right wing infiltrators' for the violence and vandalism that have taken place at protests this year.

When Watters asked about a police horse that was stabbed by an antifa member and asked if it was a 'racist Trump supporter', Kumbi said 'yes', calling it a 'tool of the police'.

He also called on others to 'bash the fash' in a reference to taking down fascists.

Kumbi has a large internet presence, with more than 27,000 followers on his YouTube channel.