There is a lot of multiculural societies, for example in Norway. In Norway there's a lot of foreigners living here, and the Norwegian community is becomming more and more multicultural. This may seem as a problem for some, because they are demanding that the Norwegians accept their way of living. They have their own monastaries and mosques, and a few Norwegians does not like this.
When two cultural families bond, for example a Norwegian lady and a Pakistanian man get married, this may cause problems when it comes to cultural traditions, and as we saw in the movie, the mix of cultures led to a lot of problems when it came to marriage for their kids and stuff like that.