The response to this incident is very predictable. In all western countries where private gun ownership has been effectively banned, there has always been some sort of tragedy like this which anti-gun politicians have used to manipulate public opinion. As terrible as this crime was, the left will do all it can to push gun-control. Supporters of the 2nd Amendment will have to get prepared for an intense and protracted effort to deprives us of our Constitutional rights.
Honestly, we can't flee to countries like Australia, Canada, Great Britain, all with significant gun control.