As usual the politically cutting edge DIYNOT posters were well behind the times. Is it terrorism? Is it hamas etc. Film of the incident was on Facebook mid-morning onwards showing the attacker and "what" he was. Stick to citizen journalists folks.
One sad but not surprising thing is that, in the footage, a man is on the ground bleeding heavily and nobody is attending to him, everybody more interested in what the police were doing.
Also to note, somebody behind the camera is heard to shout "he tried to get into a school".
Helicopters were all over Manchester for the rest of the day.