I think that these are two different issues. You are asking if Christian schools should accept kids whose parents aren't believers. These parents signed an agreement stating that at least one of them was living a Christian life.
I think that Christian schools could be great places for outreach. However, when parents are deceitful, unfortunately, their kids pay a price.
Christian education is about making a sort of Christian 'ghetto' for kids to be educated in...one that shields kids from blatant disregard for God's word. To not know that Christians have a problem with homosexuality is to be stupid or to be pretending so as to hide your true agenda. If the school knew about the girl's situation, they might have erred on the side of grace, I hope. But now, they are dealing with people who have lied to them outright about core convictions that they hold dear so that their kid could go to a good school. That's wrong. There are consequences for wrong behavior.
And, BTW, this kid was paying a price before she ever enrolled at the school.
That is exactly the question: Should the kids be the ones to pay?
Christian education is about making a sort of Christian 'ghetto' for kids to be educated in...one that shields kids from blatant disregard for God's word. To not know that Christians have a problem with homosexuality is to be stupid or to be pretending so as to hide your true agenda.
I know all about the "ghetto for kids to be educated in". For the past three years, we had a Christian school in our third floor with a Christian teacher and 10 students.
A true Christian teacher tells it as she sees it regardless of the lifestyle of the parents. It is the homosexual parent, not the Christian school, who would be put on the defensive.