It's very odd that they would name the killer's neighbors. Who cares? Saying he lived in a wealthy neighborhood would have sufficed as background detail.
I wonder if we have another well-off, well-educated adherent of the death cult carrying out his personal jihad? Of course, he could just be a nut who had no motivations other than nuttiness.
He is most likely a jihad wannabe. And a serious coward. And mentally ill.