n Iranian man screaming “Allahu Akbar!” attacked a rabbi and his son outside a synagogue in Paris with a box-cutter.
The father and son were wearing kippahs.

Police are searching for a motive.
The Washington Post reported, via FrontPage:

An escapee from a psychiatric institution slashed a rabbi and his son with a box-cutter on Tuesday, prompting witnesses to tackle and subdue the attacker after a chase through a Paris synagogue, officials said.

The rabbi, who is in his late 40s, was recovering from surgery for a neck injury and his 18-year-old son sustained lesser injuries in the attack north of a touristic shopping area near Paris’ gilded Opera Garnier, according to police and judicial officials and Richard Prasquier, who heads CRIF, France’s largest umbrella organization of Jewish groups.

The assailant was of Iranian origin, and an official investigation was underway to determine a possible motive, Prasquier said. The attacker, now in police custody, had escaped from a psychiatric hospital near southeastern Lyon last week, said a police official on condition of anonymity because he was not authorized to speak publicly about the matter.

Agnes Thibault-Lecuivre, a spokeswoman for the Paris prosecutor’s office, said the two victims had been wearing Jewish skullcaps, and the attacker was detained after a chase through the synagogue.

Anti-Semitic acts in France have risen sharply (antisemitisme.org). In 2012, the SPCJ counted 614 anti-Semitic incidents, which is 58 percent more than in 2011 (389).

http://www.thegatewaypundit.com/2013/04/...ive-is-unclear/

Why should they be different than the U.S. Army, which couldn't find a motive that fit with the facts at Ft. Hood, i.e., A Moslem Major yelling "Allahu Akbar", while slaughtering everyone around him.