You maybe haven't actually spent any time in Sweden and compared to how people act towards each other there compared to other countries? Or, you haven't spent enough time in other countries than Sweden, making it hard to compare.

I lived there for my first 20 years, and have since lived in Spain. The amount of trust between people in the Nordics is definitely higher than most other places in the world.

I'm sure that's due to the native swedes....