In the first place, I don't think it is reasonable to expect the Church to change its teaching on the morality of homosexual relationships, nor do I think it would be right to force the Church to repeal this belief or make it inconsequential by the hand of the State.
At first I felt quite let down by this decision of the Archdiocese. A great many Catholics are divorced and re-married, contrary to Church doctrine. Even a greater number use artificial birth control, also contrary to Church doctrine. How often, I wonder, do they warn the parents that these things can get their children removed if they persist? My guess, from my experiences in Catholic education, would be not very often. It suggests, possibly, that homosexuals are becoming the punching bag for a broader cultural tension between the Catholic Church and North American culture. In the past, I think the Church has let people "draw outside the lines" and let a broad range of people into her care, hoping that the magnetism of her light will draw them in closer conformity to Christ. Not affirming where people are "off the mark", but also not using that to inhibit them from drawing from the Church what it is they can.
I think it is more of a modern style of thinking, especially with the Reformation's critique against monasticism and clericalism, that has the Church saying one either must practice the Catholic faith down to the letter or be gone. This, in my mind, is dangerous and not in tune with the real nature of any religious system. You only end up with a small, arrogant, probably personally frustrated "elect". Anyways, to get back to the point...
However, we have to understand that a Catholic school will teach that sexual intercourse belongs only within an indissoluable marriage between a man and woman.
The Archbishop wrote this:
Most parents who send their children to Catholic schools want an environment where the Catholic faith is fully taught and practiced. That simply can’t be done if teachers need to worry about wounding the feelings of their students or about alienating students from their parents. That isn’t fair to anyone—including the wider school community. Persons who have an understanding of marriage and family life sharply different from Catholic belief are often people of sincerity and good will. They have other, excellent options for education and should see in them the better course for their children.
If this education is going to teach this child that her parents are in an immoral relationship, is it really in her best interests that she attend this school?