Parental rights cases need to be considered in light of the whole picture. Perhaps if this mother was keeping her daughter isolated in some neo-Nazi cult compound while teaching her this crap, there would be grounds for some degree of state intervention. However, given that the mother is apparently sending her daughter to public school, the girl is clearly getting plenty of exposure to viewpoints different from her mother’s, as well as whatever the state considers an appropriate basic academic curriculum. Presumably, growing up with exposure to these divergent viewpoints, the girl will probably ultimately reject her mother’s neo-Nazi kookery. If the alternative viewpoints found in the school system can’t successfully compete with what this girl is learning at home, then the viewpoints promoted by the school system are in urgent need of revision.
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.
Does the school even have the authority to challenge what the girl is being taught at home? At what point is diversity education "political re-education"? At what point is the school "teaching morals" when they oppose at every turn "teaching morality" on issues like same sex attraction and premarital sex.
Political correctness strives to squash dissent. It isn't about tolerance of all ideologies, religions, politics, or heritage. It has a pretty limited list that is "approved".