From the BBC:

Why violent crime is so rare in Iceland 3 December 2013

Blue-eyedness? Hard to make an OJ-style run for the border? It’s full of Icelanders?

Here’s Wikipedia’s demographics table:

Not exactly Malmö …

None of the 28 itemized source countries are majority black or majority Muslim.

By way of contrast, here’s Malmö’s demographics from Wikipedia:

On 27 April 2011, the population of Malmö reached the 300,000 mark.[22]

Circa 43% of the population have a foreign background (135,509 residents); 31% was born abroad (99,788) and another 11% was Swedish-born (35,721), with foreign-born parents. The Middle East, Horn of Africa, former Yugoslavia and Denmark are the main sources of immigration.

As of 2015, Malmö had the fourth-highest proportion of foreign-born residents of any municipality in Sweden. In addition to these figures, 14% of the population are foreign nationals.

In 2011, the 10 largest groups of immigrants were born in Iraq (9,940), Denmark (8,972), Serbia (8,426), Bosnia and Herzegovina (5,969), Lebanon (3,780), Iran (3,375), Poland (3,053), Turkey (2,110), Hungary (2,038) and Romania (2,014). The 5 largest groups in 2014 were:

Iraq (11,003)

Serbia (8,179)

Denmark (7,916)

Poland (7,103)

Bosnia and Herzegovina (6,223)