LONDON — Prime Minister Tony Blair outlined fundamental changes in British policy and law yesterday aimed at reining in what he called the "fanatical fringe" of the country's 2 million Muslims following last month's deadly train and bus bombings.

The measures, some effective immediately and others requiring approval by Parliament, include deporting people involved with radical Web sites, shutting down places of worship seen as "fomenting extremism," and criminalizing speech deemed to justify or incite terrorism.

"Let no one be in any doubt," Blair said in a nationally televised news conference. "The rules of the game are changing."

His program comes in response to growing public sentiment here that Britain has allowed itself to become a breeding ground for extremist Muslims from around the world, putting not only Britain at risk but other nations as well.

"We're angry about them abusing our good nature and our toleration," Blair said. "Coming to Britain is not a right. And even when people have come here, staying here carries with it a duty. That duty is to share and support the values that sustain the British way of life."

His plan seemed set to win approval in Parliament, where the three major parties lined up behind Blair after the attacks and rejected claims that Britain had brought the violence on itself by sending troops to Iraq and Afghanistan.

But his plan drew strong criticism from people who said he was sacrificing civil liberties in the name of security. In their view, Britain is echoing the United States' response to the Sept. 11, 2001, attacks.

Blair's endorsement of tighter regulation of speech — including words that justify violence — is particularly controversial in a nation that has prided itself on embracing a rainbow of cultures and religions and tolerating the most incendiary speech.

But Blair, recalling the July 7 transit attacks that killed 52 people in addition to the four bombers and injured more than 700, and a second failed bombing attempt on July 21, said that "for obvious reasons, the mood now is different."

His sentiment about extremists has broad support among the British public. "They're in Britain. They don't want to be British and they hate us. I say we should sling them all out," said London resident Peter Brooks, 57.

But Shami Chakrabarti, director of Liberty, a British human-rights organization, said her group was "deeply concerned" about the measures. "The fundamental values of a democracy cannot be changed because we are provoked by terrorists," she said.

In particular, she expressed concern over the proposal to make it a crime to say something seen as "condoning, glorifying or justifying" terrorism in Britain or other countries. It was so broad, she said, that it could wind up targeting moderates critical of politicians.

Blair said he was not trying to undermine "legitimate political debate," and he was not targeting Britain's Muslim community in general, just people who were "actively engaged in inciting" violence. He denounced as "appalling rubbish" statements that the bombings were legitimate expressions of Muslim anger at the policies of Britain and the United States in Iraq and other parts of the Muslim world.

Blair said that Britain's human-rights laws might have to be modified to allow some of the changes

Blair said "once new grounds take effect" for deporting people, "there will be a list drawn up of specific extremist Web sites, bookshops, centers, networks," and that "active engagement" with any of them would be a "trigger" for possible deportation.

Blair said he would establish among Britain's Muslims a commission to advise on how to better integrate into society "those parts of the community presently inadequately integrated." He said he wanted Britain's Muslims, most of whom he said abhor the actions of extremists, to be partners in rooting out radicals.

Iqbal Sacranie, who heads the Muslim Council of Britain, said the group would be seeking more details from Blair, but his early response was concern. "Our democratic values need to be upheld, not undermined," he said.

"No one should have the right to close down an institution such as a mosque; it will only ignite further anger and frustration in the hearts and minds of Muslims," Ajmal Masroor of the Islamic Society of Britain said.

Other Muslims called the proposals long overdue. "Day after day these lunatics on our behalf ... are really messing up our lives here," Omar Farooq, also of the Islamic Society of Britain, told the British Broadcasting Corp.

The British government, following European Union human-rights regulations, does not deport people to countries where they might face torture or other inhumane treatment, or death. Some critics expressed fear that Blair's proposals would end that policy. But Blair said he was confident that Britain could get assurances from foreign governments that deportees would be treated humanely.

Abu Qatada, a radical cleric whose inflammatory taped speeches were found at the Hamburg apartment of some of the Sept. 11 hijackers, is being held under house arrest in Britain.

British officials have been unable to bring him to trial, but legal impediments that Blair wants to eliminate also prevent the government from sending him to Jordan, where he has been sentenced to death for plotting bomb attacks. Blair said he was near an agreement with Jordan that would allow Qatada and others to be deported there with assurances of humane treatment.

Britain's Channel 4 News reported last night that one of the suspects in the July 21 bombing attempt, Hamdi Issac, had been reported to police in 2003 by members of his mosque in south London. Mosque officials sent police a letter saying he was "inciting racial and religious hatred," but police responded that there was nothing they could do under current law.

Information from The Associated Press is included in this report.