Most succesful police unit in Sweden against gang crime is in Uppsala and even that one is led by some ex Balkanese. Even that guy wants to see laws change into more american style "3 strikes and you're out" to get rid of the worst ones.
Big issue is that the police and court arent really adapted to this style of crime so the punishments arent really of right proportion.
Just for example a dude that threw a grenade under a police van with police officers in it got 1 year sentence. In every other normal country this would be min 10 years to life.
While its nice to spit on criminals in segregated areas alot of blame lies also with passive police and with normal ethnics.
There are actual people made of flesh and blood living in those areas but the unengaged, scared of conflict swedes just leave them to their own and see them as a noise, a daily nuisance they try to avoid in their lives and blame gov for not dealing with it. Not really easy to integrate when you cant even spot a swede in a mile radius.
Well, after 30 years of ignoring the elephant in the room you're getting the results.
Congratulations.