Cameron: Radical Islam is mirror image of neo-Nazis

He used a keynote speech on race and integration to signal plans for tough measures against extremists on both sides.

Attacking the BNP for preaching "pure hate", he went on: "And those who seek a Sharia state, or special treatment and a separate law for British Muslims are, in many ways, the mirror image of the BNP.

"They also want to divide people into 'us' and 'them.' And they too seek out grievances to exploit."

The Tory leader spoke out as a disturbing opinion poll found that radical anti-western attitudes have grown in a generation of young Muslims. The survey found that almost four in 10 would like to live under Sharia law and some 13 per cent "admired" terrorists like those in al Qaeda.

Mr Cameron said the Conservative policy review would publish a report on extremism tomorrow and pledged to unveil new measures against them before long.

Speaking this afternoon at the New Testament Church of God in Handsworth, Birmingham, Mr Cameron was set to say that many barriers to integration were the fault of politicians.

Multiculturalism, he was due to say, was "manipulated" to separate communities rather than help them live together. Warning of "educational apartheid", in his speech he was set to say that poor schools were also to blame because they condemned some children to poverty and were too ignorant to challenge prejudice and extremism.

"Those who get left behind are prime targets for extremists who offer easy explanations and point the finger of blame at other people," he was due to tell his audience. "Young white men are told, 'The blacks are all criminals.' Young Afro-Caribbean men are told, 'The Asian shopkeepers are ripping you off.' Young Muslim men are told, 'The British want to destroy Islam.'"

Mr Cameron's speech adds: "The best answer to ignorance like this is a good education."

And the Tory leader was calling for a slow-down in immigration, which "puts pressure on housing, on public services, and helps create division, fear and resentment - among British people of all ethnic backgrounds".

In an interview with the Sun, Mr Cameron called for a public holiday on the Queen's birthday to encourage people to celebrate their "True Britishness".

Today's poll found a growing minority of young Muslims are being radicalised by political Islam.

Only six in 10 young Muslims, aged under 24, felt they had more in common with non-Muslim people in the UK than with foreign Muslims. Among older Muslims, the figure was 71 per cent.

The proportion who would prefer to live under Sharia law than secular British law differed from 17 per cent among over-55s to 37 per cent among 16- to 24-year-olds.

Young Muslims were twice as likely to want to send their children to a Muslim school. Almost three-quarters said women should wear the veil and 13 per cent admired al Qaeda.

* The Tory leader came under fire today for using the term "crusade" in a call for the integration of Muslims. Complaints followed a newspaper article in which David Cameron called for a "crusade for fairness". Osama Saeed, of the Muslim Association of Britain, said he agreed with much of Mr Cameron's message, but added: "I think it is extraordinarily sloppy language - which is the most charitable slant I can put on it." In medieval times, the crusades were Christian military campaigns to seize Jerusalem from the Muslims. Mr Saeed said: "George Bush launched his 'crusade' against terrorism a few years ago - and I do not understand the fixation with it. It is not a nice word and nice things do not happen on the back of crusades."