In online forums, Rohingya are referred to as dogs, thieves, terrorists and various expletives. Commenters urge the government to “make them disappear” and seem particularly enraged that Western countries and the United Nations are highlighting their plight.

The violence in Rakhine State, which borders Bangladesh, has left 29 people dead and more than 2,500 houses burned during the past week, according to officials quoted in the Burmese news media. About 30,000 people have been displaced by the violence, according to the United Nations.

Harder to measure has been damage to Myanmar’s complex multiethnic fabric as the government of President Thein Sein tries to steer the country toward reconciliation between the military and the people, and between the Bamar majority and the dozens of smaller ethnic groups.

So far, the violence has been limited to Rakhine, which is relatively isolated from the rest of the country by a mountain range. But many among those who have posted angry comments on Internet sites have equated the Rohingya with other Muslims scattered around Myanmar. In Yangon, Myanmar’s main city, worshipers at mosques reported that prayer services left out traditional Friday sermons as a precaution against widening the sectarian conflict.

The issue of the Rohingya is so delicate that even Myanmar’s leading defender of human rights and democracy, Daw Aung San Suu Kyi, has been oblique and evasive about the situation. Asked at a news conference on Thursday whether the estimated 800,000 Rohingyas in Myanmar should be given citizenship, Ms. Aung San Suu Kyi was equivocal. “We have to be very clear about what the laws of citizenship are and who are entitled to them,” she said in Geneva, which she was visiting as part of a European tour. “All those who are entitled to citizenship should be treated as full citizens deserving all the rights that must be given to them.”