One reason for the previously very high trust that existed in Sweden is the homogenous population. Everyone spoke the same language, knew the same songs, had the same values. (Other reasons could include protestantism, the cold climate, low crime rates etc).

When the population is becoming very diverse, and as crime is increasing, trust falls. This is not speculation, it is well known. And it's happening in Sweden, it's just trailing behind. People over 40 grew up in one of the safest countries in human history, so it takes time for them to adjust to the new reality. In 30 years, trust in Sweden will approach Rio.

> When the population is becoming very diverse, and as crime is increasing, trust falls. This is not speculation, it is well known.

Diversity causes crime to increase? That's only 'well known' among people who oppose those who are different than them.

In the case of Sweden it's not a secret that crime has increased exactly because of immigration, since some immigrant groups are extremely over represented in crime stats.

Looking at crimes in general, people with both parents born outside of Sweden are about 3x more likely to commit crimes, and the over representation is even higher for violent crimes.

Looking at violent rape, 75% of assailants were born outside Europe.

There are very extensive statistics on this, and unfortunately they don't go away no matter how much you love people "that are different". Even calling people racists doesn't work, believe me they tried.