This must be why everyone wants to immigrate to Norway and not the US.
I can’t speak about Iceland or Australia, but Norway has a huge number and percentage of immigrants, particularly from Somalia, Sri Lanka, Pakistan and more recently, Iraq and Afghanistan. It’s been a growing population (I believe it’s up to about 10% of the population), and a growing concern for native Norwegians, who have been a fairly homogenous group for centuries. They are now confronted with the same economic and cultural issues that other countries are dealing with.