JENA, La. — About 50 white separatists protested the Martin Luther King Jr. holiday yesterday in this tiny town, which was thrust into the spotlight months ago by 20,000 demonstrators who claimed prosecutors discriminated against blacks.

Police separated participants in the “pro-majority” rally organized by the Learned, Miss.-based Nationalist Movement from a racially mixed group of about 100 counter-demonstrators outside the La-Salle Parish Courthouse. There was no violence and one arrest, a counter-demonstrator.

Chants of “No KKK” from the mostly college-aged counter-demonstrators with met with a chant from the separatists that contained a racial epithet.

At one point, dozens of state police forced back a group of counter-demonstrators who had gathered around a podium where the separatist group’s leader, Richard Barrett, was to speak.

One man who broke away from the crowd was arrested and booked with battery on a police officer and resisting arrest; authorities identified him as William Winchester Jr. of New Orleans and said he was a member of the New Black Panthers.

Race relations in Jena (population about 2,800) have been in the news ever since six black teenagers were arrested in the beating of a white classmate in December 2006.

About 20,000 people peacefully marched in support of the so-called Jena Six in September, and yesterday’s demonstration was organized in opposition to both the teenagers and the King holiday.

Five of the blacks were originally charged with attempted murder, leading to accusations that they were being prosecuted harshly because of their race. Charges have since been reduced.

Critics of the prosecutor have noted that months before the beating, no charges were filed against three other white students accused of hanging nooses — seen as signs of racial intimidation — in a tree at Jena High School. The prosecutor has said the noose hangings, while “abhorrent,” violated no state law.

Many Jena residents said coverage of the controversy last year unfairly portrayed them as racists, and Mr. Barrett’s group brought renewed unwanted attention. Only when faced with a lawsuit did the town drop a requirement that the Nationalists post a $10,000 security bond for a permit.

Jena resident Dayna Brown, a black woman who made a scrapbook on the September protest, had her camera in hand yesterday. She said she was ready to see Jena’s time in the spotlight end.

“I’m hoping this is the last of it,” Ms. Brown said. “Jena’s not a bad place to live if you’re black or white. We’d just all like to see things settle down.”

The Reverend Al Sharpton, an organizer of the September march, preached at a Jena church Sunday but was not among the counter-demonstrators; he said he had prior commitments.

Some of the Nationalist supporters were armed despite a call from Mr. Barrett to leave guns behind. Acting LaSalle Parish Sheriff Scott Franklin told a father and son from Tioga, about 30 miles from Jena, to put away two shotguns. Mr. Franklin allowed them to continue to wear holstered sidearms, but Jena Police Chief Paul Smith told David Dupre Jr. and his father that they would have to put away all weapons during the march, under Louisiana law.