http://www.latimes.com/world/la-fg-berlin-suspect-20161223-story.html
He was killed in a shootout in Milan. Whether he had a network of conspirators is still a question.
So he was Tunisian, not Syrian. I wonder why he was admitted to Germany in the first place. Then when he was denied asylum, he was not removed quickly. It is not bigotry to remove illegal entrants who are criminals who may do harm to citizens.