Hyperbole. That was already included in my previous reply.
That one police officer with no official or other standing says one thing doesn't a summer make. (Why he says that I don't know, but there are a number of mundane reasons).
Now, yes, we're having problems in certain areas. And they seem to stick. No denying that. BUT, by that token, why take the word of one policeman when it comes to "no-go zones". We've had much worse in the very city I'm writing this from. That was a real loss of control of general order from the police. No question about it. And even those reports were overblown. The city was perfectly safe for anybody who wasn't either a protester or police even at the height of "the troubles" (:-)). I should know, I was there... I can only imagine what "swedenreport" would have reported had he been there... He would no doubt be on about how Sweden still wasn't safe for the public and how police were still out of control of the streets. (Hint. If they ever were, they regained it very quickly. That wasn't actually the problem, but rather the overreaction of the establishment to what was really a rather minor incident, all things considered.)
So, what we're having now is the analogue. Police can't act like the usually do, i.e. just a single patrol can't necessarily just take off after a suspect if that suspect flees to certain streets in certain parts of the city in the middle of the night or they might get a stone thrown at their car. They have to actually call for backup. And since Swedish police is dimensioned for the actual need, that backup isn't available. Hence they'll let is slide, and the fiction of "no-go zones" were invented.
When police reallocates (as they have due to the last spate of shootings), lo and behold that place is cleared out in short order. (And then police will allocate back, the bad places left to fester and the cycle repeats. We wouldn't even need more police to solve that, but for the police we have to work when crimes are actually committed, i.e. nights and weekends. But since our police force is ageing, they don't want to/need to work nights and weekends. This is actually a bigger problem than any "no-go" zone).
I mean I sympathise with your need to defend what I presume is your home country, we had something similar here in Ireland during the troubles, tourists were afraid they'd get shot in the streets - no, folks, that's Northern Ireland, part of the UK - but from those reports it does seem as though a real problem exists. It doesn't appear to be widespread, yet, but there it is.
That's a useful analogy. First of course, even in Northern Ireland the streets were "completely safe" even at the heights of the troubles. If you weren't a British squaddie walking alone down Falls road in the middle of the night. If you do the numbers, US crime in New York beat the death rate of "the troubles" by a factor of ten if you look at the period as a whole.
Second. Even taking that as a comparison, the very worst current level of violence in Gothenburg, taking the recent spate of shootings into account, doesn't even begin to reach the level of IRA violence in Republic of Ireland during the troubles. The tourists you speak of objectively were in more danger from the IRA walking the streets of Dublin than the would walking our streets here. In both cases, while the difference in relative risk is quite substantial, the difference in absolute risk is similar, as the absolute risk is the same: as close to zero as to make no difference.
So, it's interesting that you should mention the troubles, as we have a similar situation here, much, much more ink is being spilled than actual blood. Making the general public think there is danger where there actually isn't.
This isn't due to a need to "defend" my home country BTW. To the extent that it needs defending it can do that very well itself, thank you very much, but rather that these horrid little one man web show like "swedenreport" really needs to go off in a corner and die. They're part of the noise, not the signal. I'm happy to say that even though we've seen the general decline of news reporting that the rest of the west has seen, we never had to suffer the likes of the British tabloids, and I'll be damned if we have to suffer it from the likes of swedenreport.
So if you seriously want to learn about the current Swedish situation get yourself a real source. If you're just another one of the "OMG MUSLIMS!!!" looking to verify your preconceived notions, then there are quite frankly better (i.e. even worse, even less connected to reality) sources out there for you to quote. The conclusion however, is the same: In either case, stay away from "swedenreport."