PARIS (JTA) — With scooter helmets in hand, a man called Yohan and six buddies stroll around Paris’ 20th arrondissement. The seven look much like a typical group of French students — until they locate a group of Arab men they suspect of perpetrating an anti-Semitic attack the previous day.

Using their helmets as bludgeons, members of France’s Jewish Defense League, or LDJ, set upon the Arabs and beat them. Several of the Arabs attempt to escape in a blue sedan, but the LDJ members pursue the vehicle, causing it to crash into a stone wall.

The attack last August, filmed by a television crew shooting a documentary on LDJ, was one of at least 115 violent incidents that critics attribute to the group since its registration in France in 2001 — a year after the eruption of the second intifada in Israel and the sevenfold increase in anti-Semitic incidents in the 12 years that followed.

“Now they know the price of Jewish blood,” said Yohan, the nom de guerre of Joseph Ayache, one of LDJ’s young bosses.

An offshoot of the American Jewish Defense League, which was founded in New York by the ultranationalist Rabbi Meir Kahane in 1968 and which the FBI considers a domestic terrorist group, LDJ stages violent reprisals to anti-Semitic attacks.

The group, which numbers about 300 members, is now on a collision course with France’s Jewish establishment, which has condemned its activities and threatened a lawsuit.

French authorities have ignored calls to ban LDJ, though in Israel the Kach movement, also founded by Kahane, has been outlawed.

The French government’s apparent acquiescence may have inspired LDJ to ratchet up its deterrent potential by showcasing its activities following the murder of four Jews in Toulouse last year by a Muslim extremist.

LDJ traditionally had shied away from media attention. But in the weeks after the killings, which was followed by a 58 percent increase in attacks on Jews in France over the year before, LDJ for the first time allowed a television crew to tag along on a number of guerrilla operations.

In addition to the helmet assault, Ayache was filmed calling for revenge killings in posters he and his group posted around central Paris. When a police car neared, Ayache told officers that he and his friends were working on an art project. The police officers wished him a pleasant evening and drove away.

Ayache also was filmed attempting to storm a performance of the anti-Semitic comedian Dieudonne.

“Since when is it illegal to run?” a brazen Ayache told the police after they detained him.

Another sequence shows Ayache firing a pistol at a shooting range.

“We’ve noticed the Muslim community believes LDJ is some vast machine that operates with impunity and help from Mossad,” said an LDJ spokesman who goes by the alias Amnon Cohen. “It’s not true, but it’s not a bad thing if they are scared. It’ll make them think twice.”

LDJ’s growing assertiveness has further strained the group’s already tense relationship with the CRIF, the umbrella body of French Jewish communities.

In April, CRIF’s former president, Richard Prasquier, said he would sue LDJ for defamation for posting a photograph on its website depicting him with Palestinian Authority President Mahmoud Abbas. The caption accuses Prasquier of “pardoning [a] killer.”

LDJ, meanwhile, has accused CRIF of being undemocratic, obsolete and ineffective.

“We operate outside and independently, and that creates opposition within the establishment, which is run by men and women who mean well but don’t know the painful reality of the Jewish rank and file in Paris’ suburbs and poor neighborhoods,” Cohen said.

“There are hundreds of French and Belgian Muslims fighting in the Syrian civil war. When they return, do you think they will be scared of a couple guards trained by the community?”

CRIF declined to comment.

Earlier this month, LDJ announced that its “soldiers” had put a young Arab in the hospital with a coma, “a rapid and effective response” to the man’s attack on Jews at Saint-Mande, just east of Paris.

The announcement drew calls to ban LDJ. As criticism mounted, LDJ retracted the statement and denied any involvement in the violence.

Cohen told JTA the person who published the “false statement” had been removed from the group and that the violence actually resulted from a drug deal gone sour. A spokesperson for the Saint-Mande municipality confirmed that account.

Still, the events at Saint-Mande resulted in a public row between LDJ and CRIF, which on June 4 blamed LDJ for the violence at Saint Mande and for subsequent calls “to take revenge against the Jews.”

Cohen said CRIF is looking for a “scapegoat” to distract from its failure to prevent attacks on Jews through outreach and education. He also denied the group engages in violence, despite ample evidence to the contrary.

Besides the television footage, a French court last week sentenced LDJ activist David Ben Aroch to six months in prison for an attack he staged with another LDJ member at a Paris bookstore owned by a pro-Palestinian activist.

Aroch’s accomplice, Jason Tibi, was sentenced to four months for the attack at Librairie Resistance that sent the two victims to the hospital for days.

It may have been a real-life demonstration of what one masked LDJ boss recently called “treatment a la Israel” during a speech at a secret training camp in France.

The filmed address was the introduction to a LDJ propaganda clip titled “Five cops for every Jew, 10 Arabs for each rabbi.”