From the article;
"This was a terrifying ordeal for the victims, and a completely unprovoked attack, which will have a financial impact on these victims.
That is the most concerning bit. It would have been bad enough if this was the culmination of an ongoing dispute, or retaliation for something significant, but it being completely unprovoked takes it to a whole other level. I hope this offender is not released on bail or home detention, he is clearly dangerous to society