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The outspoken comic said young people were being driven to “mad jihadism”.

Brand, 39, insisted Isis was exploiting “loneliness” and “disengagement”.

The comedian said City of London bankers had wrecked society.

“The kernel of truth in the sprawling, bewildering bramble of Isis madness is society isn’t working, the system isn’t working it’s totally corrupt,” he ranted.

“That is the thing that resonates in the core of young people.

That is the thing that pulls them into mad jihadism.

“If an ideology as mad as Isis can appeal to a certain section of the population we have a huge cultural problem.”

Brand signs off his web outburst by cracking a joke about the terror network.

He urges viewers to subscribe to his YouTube shows, adding: “It’s better than Isis.”

Meanwhile Boris Johnson blasted human rights group CAGE which blamed the security services for Mohammed Emwazi’s killing spree as Jihadi John.

The London mayor told CAGE’s director Asim Qureshi when he phoned his LBC radio show: “I really think the focus of your indignation and outrage should be on people who go out to join groups that throw gays off cliffs, that behead people who don’t subscribe to their version of Islam, that glorify in the execution of innocent journalists and aid workers.”