Why should an immigrant or refugee be integrated? Integrated to what? According to the Swedish constitution no Swedish citizen may be discriminated because of race, religion ethnicity etc. Is there any problems in allowing immigrants the same rights as Swedish citizens?
Assimilation seems to be still worse.
The only thing Swedish authorities could do, paid by tax money, is to improve the understanding between people. That could be done by offering immigrants and Swedish citizens to learn English. In the long run, who profits most? The one knowing Swedish or the one knowing English?