Let me help you out here bud... This is officially from the police:
"The violence was ‘linked to protests against the police that have been going on for a number of days,' a police spokesman said.
The police spokesman said that – contrary to some reports – there was ‘no terrorist or Islamist link to the attack whatsoever’.
He said there was ‘no evidence’ that religious slogans had been shouted out by the bus attackers.
Instead, it was carried out by youths protesting following the death of Adama Traore, who died in the commuter town of Beaumont-sur-Oise, 20 miles north of Paris, on July 19."
Saint-Denis bus torched by street gang in riots against ‘police racism’ - DAILY MAIL
From the police:
-Violence linked to protests that have been ongoing in response to the death of Adama Traore who died in the hands of the police
-No terrorist or Islamist link to the attack
-No evidence that any religious slogans were shouted
This all comes from an official police spokesman. But hey, lets trust RT!