Well, it escalated for a long time. The law in Germany is, that children have to go to some school public or private. In this case, the family refused to send t

Well, it escalated for a long time. The law in Germany is, that children have to go to some school public or private. In this case, the family refused to send the children to any school, and it escalated to a point where the government appointed a guardian for the children. Then the family left Germany and apparently returned now. So as far as I understand the legal argument: the parents have no longer the right to take the children out of Germany and therefore the passports were taken to prevent this.