The main stream media has almost completely covered up this story. Immediately after the attack an eye witness posted a video saying that the attacker was screaming out "Allah Akbar" (see here) but the Police told people sharing it on Facebook to take it down. Immediately - before any investigation - they ruled out terrorism and as usual blamed 'mental illness'.
Now take a look at this very long report of the attack in the Mail online. If you scroll down a very long way you will find this statement by his close friend:
'He was a great guy but ice destroyed him. Then he converted to Muslim and changed very quickly. For over a month he's been on edge'
What is not mentioned of course is that many recent converts to Islam with serious personal and other problems carry out Jihadist attacks because they are told that killing infidels guarantees they avoid going to hell.
Remember also that in October 2016 the EU instructed the press not to report Muslim involvement in terrorist attacks.