- categorically refuse to assimilate or integrate into the host country's culture

- refuse to learn the language(s) of the host country

- ...which makes these people unemployable other than in government services dealing with other people from their own cultural and linguistic area

- ...which makes them a burden on their host societies

- ...not to mention the group of people who just refuse to accept employment because they get so much welfare from the state and local council that they don't see the need to do so (which goes against the culture of working when you can so that those who really can not work can be supported by those who can and do, the original concept of generous welfare states like Sweden)

When I moved to Sweden I did a few things, on my own accord and at my own cost. I bought a box of second-hand books (dirt cheap at Red Cross shops) including an encyclopedia, I started listening to Swedish radio and I enrolled myself in a Swedish language course at the open university. Within a few months I understood most of what I heard on the radio, I could speak well enough Swedish to not have to switch to English every third sentence and I had finished the box of books including the encyclopedia. I volunteered at the 'vägförening' (private road community, something you get to deal with when living in the countryside where the communal road network has not penetrated), volunteered as a swimming instructor at the local swimming school, help my neighbours fixing their tractors and other agricultural implements while borrowing some of theirs, etc. I still do things differently from the average Swede, e.g. I'm more likely to speak my mind and less wont to avoid conflicts. If I had moved to Canada as I originally planned I'd have done the same (i.e. I'd have learned better French than I currently speak) and I'd have assimilated mostly into that culture while keeping some of my specific cultural traits. Had I moved to, say, Hungary or Finland I'd probably have had a bit more trouble learning the language but that'd only have added a few months to the process. When in Rome, act as the Romans. When in Sweden, act as the Swedes. If you insist on antagonising them by acting very much unlike them, by refusing to learn their language while abusing the overly generous welfare system for years it should not surprise anyone that people start calling your bluff.