The first caller to the station in Washington said that Klein must be "off his rocker." The second congratulated him and added: "Not only do you tattoo them in the middle of their forehead but you ship them out of this country ... they are here to kill us."

Another said that tattoos, armbands and other identifying markers such as crescent marks on driver's licenses, passports and birth certificates did not go far enough. "What good is identifying them?" he asked. "You have to set up encampments like during World War Two with the Japanese and Germans."

At the end of the one-hour show, rich with arguments on why visual identification of "the threat in our midst" would alleviate the public's fears, Klein revealed that he had staged a hoax. It drew out reactions that are not uncommon in post-9/11 America.

"I can't believe any of you are sick enough to have agreed for one second with anything I said," he told his audience on the AM station 630WMAL (http://www.wmal.com/), which covers Washington, Northern Virginia and Maryland.

"For me to suggest to tattoo marks on people's bodies, have them wear armbands, put a crescent moon on their driver's license on their passport or birth certificate is disgusting. It's beyond disgusting.

"Because basically what you just did was show me how the German people allowed what happened to the Jews to happen ... We need to separate them, we need to tattoo their arms, we need to make them wear the yellow Star of David, we need to put them in concentration camps, we basically just need to kill them all because they are dangerous."

The show aired on November 26, the Sunday after the Thanksgiving holiday, and Klein said in an interview afterwards he had been surprised by the response.

"The switchboard went from empty to totally jammed within minutes," said Klein. "There were plenty of callers angry with me, but there were plenty who agreed.”

Polls Show Widespread Anti-muslim Sentiment
Roughly a quarter of those polled said they would not want to live next door to a Muslim and a third thought that Muslims in the United States sympathized with al-Qaeda, the extremist group behind the September 11, 2001, attacks on New York and Washington.

A poll carried out by the Council on American-Islamic Relations (CAIR), an advocacy group, found that for one in three Americans, the word Islam triggers negative connotations such as "war," "hatred" and "terrorist." The war in Iraq has contributed to such perceptions.

Klein's show followed a week of heated discussions on talk radio, including his own, and online forums over an incident on November 22 involving six Muslim clerics. They were handcuffed and taken off a US Airways flight after passengers reported "suspicious behavior" that included praying in the departure gate area.

The clerics, on their way to a meeting of the North American Imams Federation, were detained in a holding cell, questioned by police and FBI agents, and released. Muslim community leaders saw the incident as yet more evidence of anti-Muslim prejudice.

Ignorance Seen As Key Problem
Several American Muslims interviewed on the subject of prejudice over the past few weeks said ignorance was at the core of the problem.

"The level of knowledge is very, very low," said Mohamed Esa, a US Muslim of Arab descent who teaches a course on Islam at McDaniel College in Maryland. "There are 1.3 billion Muslims in the world and some people think they are all terrorists."