Updated

This is a rush transcript from "On the Record," July 20, 2015. This copy may not be in its final form and may be updated.

GRETA VAN SUSTEREN, FOX NEWS HOST: A rising terror threat around the world. And right now, a key American ally, the United Kingdom making a major new mush to take on Islamic extremism. Just hours ago, British Prime Minister David Cameron outlining his plan to defeat radical Islam in the U.K.

(BEGIN VIDEO CLIP)

DAVID CAMERON, BRITISH PRIME MINISTER: This isn't a pioneering movement. It is a vicious, brutal, and fundamentally abhorrent existence. And here's my message to any young person here in Britain thinking of going out there, you won't be some valued member of a moment. You are cannon fodder for them. They will use you. If you are a boy, they will brain wash you, strap bombs to your body and blow you up. If you are a girl, they will enslave and abuse you. That is the sick and brutal reality of ISIL.

(END VIDEO CLIP)

VAN SUSTEREN: Joining us now, Nile Gardiner, the director of the Margaret Thatcher Center for Freedom.

He went on to say things that the British Muslims and I assume he is talking about extremist Muslims are intolerant of other thoughts. And that the failure of integration that even those who are born in the U.K. grow up not identifying themselves as British subjects but as part of some larger movement.

NILE GARDINER, MARGARET THATCHER CENTER FOR FREEDOM DIRECTOR: This was a powerful speech today by David Cameron, and I think he struck the right note. He took the challenge to British Muslims saying that they have to deal with the extremism in their midst. He directly identified the ideological and religious nature of the Islamist threat, and he talked about the poisonous ideology of Islamist extremism that has it to be defeated, not just by the government but by British Muslims themselves. He laid down the gauntlet to Muslim leaders saying you have to do more to confront the vicious poisonous extremism in their communities.

VAN SUSTEREN: I also thought -- he said something a lot of people isn't saying many in the world. And I think he is directing this message to Muslims, who don't appreciate all the work that has been done by non- Muslims to stop the slaughter of radical Islam Muslims against Muslims. He talked about Kosovo. He talked about Somalia. He talked about Bokoharam, ISIS, and Al Qaeda. All this Muslim on Muslim killing, they're radical Muslim on Muslim. There has been a lot of blood shed where others are trying to stop that. I felt like he was mad that nobody ever thanked those who worked hard to stop it?

GARDINER: Yes, an extremely important point. And I think that David Cameron made an emphatic defense of his own country, Great Britain, but also the west. And so much western blood has been shed to protect Muslims, and he pointed out that many British soldiers have defended their lives to defend Muslims. And so this was a passionate defense I think of his country's record. And also -- to those Muslims who say the west is persecuting them. His response is that British people must be proud of British values. British Muslims must be proud of the country in which they live. So direct challenge I think to the Muslim's status quo in Britain, so certainly some very brave remarks for the Prime Minister to make, actually the right ones to make.

VAN SUSTEREN: We'll see how it's received around the world, anyway. Nile, thank you, nice to see you.

GARDINER: My pleasure, thank you.