Not everything is terrorism. Just because he's brown skinned...
Well, trying to make sense of the little that's been said so far, this appears to be an act of far-right terrorism.
The video was shared very widely on Twitter, and unfortunately I saw it without looking for it. Horrifying. Thoughts are with the dead and injured, and all those in the emergency services.
5 dead (number, sadly, is expected to rise)
41 critically injured
90 seriously injured
80 with less serious injuries