AMSTERDAM, Netherlands — Six Muslims accused of plotting an attack against Dutch politicians went on trial yesterday, including a man who was acquitted last year on separate charges in a setback for prosecutors.

Since Samir Azzouz’s earlier trial, the government has passed new laws making membership in a terrorist organization a crime and outlawing “recruiting” for a terrorist network. Mr. Azzouz, 20, is charged with both, as well as plotting to murder one or more politicians that authorities said he considered hostile to Islam. Evidence against him includes a videotaped apparent suicide message Mr. Azzouz recorded — leaked and broadcast on national television — in which he is shown holding an automatic rifle and saying he wanted to punish the Dutch people for their government’s support of the American-led war on terrorism.

“You are considered warriors because you chose this government.Your possessions and blood are promised to us,” he said on the tape. Months after Mr. Azzouz’s release following his April 2005 acquittal, he was arrested and accused of plotting to attack a Dutch politician or government building.Authorities said he had tried to buy weapons for the attack.

Yesterday, Mr. Azzouz grinned and chatted with his co-defendants in court.

Defense lawyer Victor Koppe says Mr. Azzouz is innocent of any wrongdoing and his latest prosecution shows authorities are prejudiced against him and harassing him.

Other evidence in the current case includes automatic weapons, digital bombmaking manuals, and a list of the home addresses of politicians, including Prime Minister Balkenende and a former member of parliament, Ayaan Hirsi Ali, authorities said.

In June 2004, Mr. Azzouz was arrested as a suspect in the armed robbery of a grocery store. At his home, police said they found bomb-making materials and detailed maps of parliament, Amsterdam’s Schiphol Airport, and a nuclear reactor. He was taken into custody, and the country was put on a nationwide terror alert that lasted for several weeks.

Investigators also said they found a pellet gun, ammunition clips and a silencer for automatic weapons, night vision goggles, and a bulletproof vest at Mr. Azzouz’s home. In the April 2005 verdict, judges found the bomb-making materials he had assembled were not capable of causing an explosion. He was convicted on weapons possession charges and released with time served.

The Dutch secret service said then that it considers him a terrorist, and the agency keeps him under constant surveillance.