Pakistanis from Britain, a growing concern for US.

It is very difficult to estimate the precise number of Muslims currently living in the United States. Muslims tend to put the number somewhat higher than non-Muslim scholars and demographers; the estimated figures range widely - from around two million in one study to as many as seven million. There are several reasons for the varying estimates. First, because the U.S. Constitution mandates a separation of church and state that is reflected in American law, U.S. Census Bureau survey forms do not ask recipients about their religion. Neither does the U.S. Immigration Service collect information on the religion of immigrants.

This could be a problem as recent events from Britain demonstrate, specifically UK citizens from Pakistan. The NYT reports:

U.S. Seeks Closing of Visa Loophole for Britons

By JANE PERLEZ
Published: May 2, 2007

LONDON, May 1 — Omar Khyam, the ringleader of the thwarted London bomb plot who was sentenced to life imprisonment on Monday, showed the potential for disaffected young men to be lured as terrorists, a threat that British officials said they would have to contend with for a generation.

But the 25-year-old Mr. Khyam, a Briton of Pakistani descent, also personifies a larger and more immediate concern: as a British citizen, he could have entered the United States without a visa, like many of an estimated 800,000 other Britons of Pakistani origin.

American officials, citing the number of terror plots in Britain involving Britons with ties to Pakistan, expressed concern over the visa loophole. In recent months, the homeland security secretary, Michael Chertoff, has opened talks with the government here on how to curb the access of British citizens of Pakistani origin to the United States.

American officials, citing the number of terror plots in Britain involving Britons with ties to Pakistan, expressed concern over the visa loophole. In recent months, the homeland security secretary, Michael Chertoff, has opened talks with the government here on how to curb the access of British citizens of Pakistani origin to the United States.

At the moment, the British are resistant, fearing that restrictions on the group of Britons would incur a backlash from a population that has always sided with the Labor Party. The Americans say they are hesitant to push too hard and embarrass their staunch ally in the Iraq war, Prime Minister Tony Blair, as he prepares to step down from office.

Among the options that have been put on the table, according to British officials, was the most onerous option to Britain, that of canceling the entire visa waiver program that allows all Britons entry to the United States without a visa. Another option, politically fraught as it is, would be to single out Britons of Pakistani origin, requiring them to make visa applications for the United States.

Rather than impose any visa restrictions, the British government has told Washington it would prefer if the Americans simply deported Britons who failed screening once they arrived at an airport in the United States, British officials said. The British also screen at their end, and share intelligence with the Americans.

But Washington feels strongly, Mr. Chertoff has said, that it has the right to build controls against terrorists from Britain who do not have a prior criminal record — precisely the kind of man Mr. Khyam was until he was arrested in early 2004 and put on trial for plotting to blow up targets like a major London nightclub and a popular suburban shopping mall.

For its part, the British government looks with dismay at the frequency with which Britons travel to their ancestral land of Pakistan — an estimated 400,000 trips a year — where a small minority, like Mr. Khyam, link up with extremist groups and acquire training in weapons and explosives.

Foreign office officials have said they have discussed measures with the Pakistani Embassy in London, which grants Pakistani passports to Britons of Pakistani descent, to consider tightening the rules for Pakistani travel documents.

In Washington, an expert on terrorism and Pakistan, Bruce Riedel, who served on the National Security Council under President Clinton and in the early Bush administration, and who recently retired after 30 years in the Central Intelligence Agency, said that Mr. Khyam was perfect material for Al Qaeda.

“He is the classic U.K.-Pakistani connection that Al Qaeda has focused on since 9/11,” said Mr. Riedel, who is now a senior fellow at the Brookings Institution in Washington. “His U.K. passport gives him international mobility. His training at a camp run for Kashmiris by Pakistan’s Inter- (rest of article)

Footnote: The most recent wave of Muslim immigration to the US has come after 1965, the year President Lyndon Johnson sponsored an immigration bill that repealed the longstanding system of quotas by national origin. Under the new system, preferences went to relatives of U.S. residents and those with special occupational skills needed in the United States. The new law was a signal act in American history, making it possible for the first time since the early part of the 20th century for someone to enter the country regardless of his or her national origin. After 1965, immigration from Western Europe began to decline significantly, with a corresponding growth in the numbers of persons arriving from the Middle East and Asia. In this era more than half of the immigrants to America from these regions have been Muslim.