Tunisian migrant with knife attacks French cops, shouting "Allahu ackbar;'" officials mystified as to motive

In France a "migrant" from Tunisia attacked French police with a knife while yelling “Allahu akbar!”

The Tunisian,charged at the police with the knife, wounding the officers before they were able to subdue and arrest him.

French officials said they're mystified as to the motive for the attack, except that they're absolutely certain it has nothing whatsoever to do with Islamic teaching or practices.  They said reports that the attacker was yelling “Allahu akbar!” are so far unconfirmed, and that even in the unlikely event these unconfirmed reports by anonymous witnesses turn out to be correct, French security experts say the meaning of the phrase is unclear.  

Experts say the phrase is widely used by peaceful shepherds to greet visitors.

Source.