By inference, it seems you would have supported some advance intervention in the Khadr case.
Whether or not the viewpoints promoted within the school system need revising — it seems to me that they don't seem to have a lot of faith in their own ability to indoctrinate the children in their charge. I suspect that the child has been traumatized by the events & will now be distrustful of all state authorities. It's hard to imagine a worse way to convince the child that her mother & her associates are kooks.
And I suspect that if they’d just let her stay with her mother, she’d soon have decided that the reception she kept getting at school for showing up with swastikas on her arm was traumatizing, and that it was her mother’s fault. Basically the conclusion we’d all want her to reach. Now at that point, if she starting objecting to her mother’s drawing swastikas on her, and the mother trued to punish her for objecting, THEN the state should definitely step in, and most likely either the mother would lay off or the child would happily waltz off into state care.