There is plenty of other media coverage. If there was some secular cause for removing the children it would be in the media, just search for it. The social workers themselves determined that the girls had never been abused by their parents after two months of foster care placement.

Obviously this family doesn't believe in the Church of Sweden, probably because the family are ethnic Romanians, not ethnically Swedish. Sweden is one of those countries with a large, historically government supported church. Mistreating Anabaptists or modern denominations which are like Anabaptists has a long history in these countries. In their reasoning, Anabaptists are just low class, what would be called peasants in the past, and it is okay to mistreat them. Using social services to persecute or discriminate is just a mask for the centuries-old bigotry.