To be honest, when you have half of the year filled with such long nights and it is generally cold, depression isn’t really going to be as rare as in some more sunny countries.
As for the nazzis, yeah, there is a trend in that. I think many voters get racist because of capitalism gets them in difficult economic situation and they fear migrants will take their jobs. And migrants are there in the first place because their regions got destroyed by wars for oil and CIA funded terrorist groups and global warming. So both wars and global warming are due to oil companies .And both difficult economic situations of the citizens and prioritization of profit for oil companies are due to capitalism. So overall, this is simply how capitalism works. It is a feature, not a bug. Without getting rid of capitalism, we will never be able to solve these issues.