Germany has basically as many privately owned guns as sweden per capita. Germany is nearer to the Balkans. It hosts a million people from a war country (Ukraine). There are lots of illegal weapons.

One important difference between Germany and Sweden: youth unemployment is much much lower in Germany.

Similar developments as in Sweden can be seen in the Netherlands, due to the drug trade.

Background to the situation in Sweden: https://www.theguardian.com/world/2023/aug/27/sweden-seeks-t...

But generally the homicide rate in Sweden is very low (~ 1/6 of the US), Germany a bit lower, still.

https://en.wikipedia.org/wiki/List_of_countries_by_intention...