Speculation that this might - MIGHT - be an Islamic terrorist attack is just that, speculation. Given the recent history of similar incidents, it is not unreasonable.
And a marked lack of sympathy for the radical extreme Muslim cause, as advocated by ISIS, Al Qaeda (sp?) etc., is not racist...
If they were born here, they were not immigrants. Fact! If that bollox's up your "a core rhetoric of the anti-immigration mob" mantra, then I'm frightfully sorry.
You don't need a driving licence to steal a vehicle! Only allowing people of non-Islamic faiths access to Europe, although ethically unacceptable, might have worked better - but, as I said, ethically unacceptable, and anyway, that horse is well and truly bolted now.