But when Faith schools starts admitting children not connected to their Church, there are all sorts of problems, which in turn downgrades the educational value to all.
Children whose families are not of the Faith will not want to take part in the religious life of the school, such as Assembly, Harvest Festival, Lent, Beginning of term Mass, etc, and may boycot the Nativity as it is of too religious nature, etc. This is not beneficial to the children, and the school needs more resources to deal with having extra staff making substitute lessons to cover for those who wont take part. This is where you actual find segregation within the school, this is when it makes sense to talk about segregation. In a faith school, the children themselves are blissfully unaware of any segregation, they go to school with children they see during Mass, during Sunday school etc.
Bearing in mind that a large chunk of the funding of a Faith school comes from parental involvement and fundraising by the schools PTA, such as baking and making things, organizing summer and Christmas Faires, where parents give up a lot of their time, donate a lot of things to sell, and generally work very hard for their school, you wont get the same involvement from parents who dont share the faith. The income of the school will go down, and this again has a detremental effect on both the children and their education.
My sons school has been raising money for a new playground for the last few years, and finally this year they could, as the Summer Faire brought in 4k, involved parents worked hard for months! We made £101 on the last bake sale, which were spent on new books for the library. Also, money has had to be raised for a bike shed, for new sinks in a class room, etc, as they dont get the same funding as a regular state school.
Instead of abolishing, why not simply copy the formula of a well run Faith school and apply it to a state school?
Theochris, your argument still does not hold, you dont chose to be of a black or a white family, but you do chose your faith.