It's a comment on the general situation in the Netherlands, sort of - which that outrage is only a result of.
It's as someone else here commented, the criminals are getting plush "prisons" and the victims are getting the real prison stuff. Example: private ownership of guns is to all intents and purposes banned there, and if you should harm an assailant you will likely go to jail. That is, in fact, not uncommon in Europe, but most of Europe has somewhat less insane laws on gun ownership. Their laws tend to be fairly bizarre, though - such as odd pistol calibers because civilians may not be allowed to own calibers also in use by the military or police.
I have discussed gun laws with a few Netherlanders. They tend to get me upset. They also seem to think that being sheep is the most desirable state in the world..