not OP, but I do believe that drug trade wouldn't take place to this extend without the immigrants.

I've lived in Finland decades ago and it was very different from where I came from - clean so to speak. Even in Helsinki Weed was hard to come by. No weird guys lurking on corners and all this scum one encounters in big cities in the wrong districts. There were no wrong districts. Scandinavia is/was (?) a different culture also because it was not riddled with such untethered people.