Your police have basically admitted that if worst comes to worst, they won't be able to uphold the law. 53 criminal zones, for a country like Sweden with relatively little police and military, are beyond managable.
We see the same in Germany, but people choose to ignore it. There are more and more areas in cities where you can't make use of your democratic liberties without being subjected to violence, mostly connected to muslim inhabitants that think their religion is above the law. We have more police and resources to cope with it, but it's reaching its limit.