David Cameron is expected to tackle Muslim conspiracy theorists who peddle antisemitic tropes in a major speech on extremism.

Speaking on Monday, the Prime Minister will outline a five-year plan to combat Islamists.

He is expected to refer to those who believe that “Jews exercise malevolent power” and engage in conspiracies that Mossad was behind the September 11 terror attacks in 2001.

In references to those who have been convicted in this country of planning terror attacks, Mr Cameron will say: “It may begin with hearing about the so-called Jewish conspiracy and then develop into hostility to the West and fundamental liberal values, before finally becoming a cultish attachment to death."

He will give the speech in Birmingham and talk about the failure of some ethnic minorities to integrate into British society.

“For all our successes as a multi-racial, multi-faith democracy, we have to confront a tragic truth that there are people born and raised in this country who don’t really identify with Britain and feel little or no attachment to other people here,” Mr Cameron will say.

Sections of the speech are also expected to focus on hate speakers and incitement to racial hatred.