I found it interesting but something seemed . . . off about it. It definitely seemed one-sided. I did a bit of sleuthing and according to one source, one of the children was trained to act like they had RS. One of the doctors also reportedly had his words taken out of context in a way that seems really suspicious to me.
I don't doubt the stories behind why these refugees were in Sweden. But keeping that in mind, you have to consider that people will do anything to keep themselves and their families safe--including lying. (I don't think that makes someone a bad person, but gaining publicity from lies certainly does.) You can see how a refugee child coming down with RS can help the family secure asylum, and so I've taken the documentary with a grain of salt.
I'm not saying all of these families are liars and this isn't a real thing, but looking back after I've watched it, it seems more like one-sided propaganda than a well-balanced, multi-faceted documentary that goes into depth on the topic.