Bangkok They have been called names and heir existence is even acknowledged.

Asia's more than 1 million ethnic Rohingya Muslims are considered by rights groups to be among the most persecuted people on earth. Most live in a bizarre, 21st-century purgatory without passports, unable to travel freely or call any place home.

In Myanmar, shaken this week by a bloody spasm of violence involving Rohingyas that left dozens of civilians dead, they are almost universally despised. The military junta whose half-century of rule ended only last year cast the group as foreigners for decades - fueling a profound resentment now reflected in waves of vitriolic hatred that are being posted online.

"People feel it very acceptable to say that 'we will work on wiping out all the Rohingyas,'" said Debbie Stothard, an activist with the Alternative ASEAN Network on Burma, referring to hyperbolic Internet comments she called "disturbing."

The Myanmar government regards Rohingyas mostly as illegal migrants from Bangladesh, despite the fact many of their families have lived in Myanmar for generations. Bangladesh rejects them just as stridently.

"This is the tragedy of being stateless," said Chris Lewa, who runs a non-governmental organization called the Arakan Project that advocates for the Rohingya cause worldwide.

"In Burma they're told they're illegals who should go back to Bangladesh. In Bangladesh, they're told they're Burmese who should go back home," Lewa said. "Unfortunately, they're just caught in the middle. They have been persecuted for decades, and it's only getting worse."

That fact was made painfully clear this week as Bangladeshi coast guard units turned back boatload after boatload of terrified Rohingya refugees trying to escape the latest violence in Myanmar's Rakhine state. Rohingyas have clashed with ethnic Rakhine Buddhists, and each side blames the other for the violence.

The boats were filled with women and children, and Bangladesh has defied international calls to let them in, saying the impoverished country's resources are already too strained.

A few have slipped through, however, including a month-old baby found Wednesday abandoned in a boat after its occupants fled border guards. Three other Rohingyas have been treated for gunshot wounds at a hospital in the Bangladeshi town of Chittagong, including one who died.

The unrest, which has seen more than 1,500 homes charred and thousands of people displaced along Myanmar's western coast, erupted after a mob dragged 10 Muslims off a bus and killed them in apparent retaliation for the rape and murder last month of a 27-year-old Buddhist woman, allegedly by Muslims.

On Thursday, Rakhine state was reportedly calm. But Rohingyas living there "very much feel like they're trapped in a box," said Phil Robertson of Human Rights Watch. "They're surrounded by enemies, and there is an extremely high level of frustration."

The grudges go back far. Bitterness against the Rohingya in Myanmar has roots in a complex web of issues: the fear that Muslims are encroaching illegally on scarce land in a predominantly Buddhist country" the fact that the Rohingya look different than other Burmese" an effort by the former junta to portray them as foreigners.

Across the border in Bangladesh, civilians - not the government - are more tolerant. But even there, the Rohingya are largely unwanted because their presence in the overpopulated country only adds to competition for scarce resources and jobs.

Myanmar's government has the largest Rohingya population in the world: 800,000, according to the United Nations. Another 250,000 are in Bangladesh, and hundreds of thousands more are scattered around other parts of the world, primarily the Middle East.

Human Rights Watch and other independent advocacy groups say Rohingyas are routinely discriminated against. In Myanmar, they are regularly subjected to forced labor by the army, a humiliation not usually applied to ethnic Rakhine who inhabit the same area, Lewa said.

The Rohingya must get government permission to travel outside their own villages and even to marry. Apparently concerned about their numbers growing, authorities have also barred them from having more than two children.

In 1978, Myanmar's army drove more than 200,000 Rohingyas into Bangladesh, according to rights groups and the U.S. Campaign for Burma. Some 10,000 died in squalid conditions, and the rest returned to Myanmar. The campaign was repeated in 1991-1992, and again a majority returned.

– AP