Hi clo,
I am not really bothered by light Christianity in the school, so long as it isn't the fundamentalist stuff.
Not a believer myself, but I think the evolved versions of Christianity serve some mostly useful purposes. The virtues of sacrifice, humility, forgiveness, mercy and charity are important ingredients of Western civilisation, which should be taught to all children. Without some set of common understandings, a society fails.
Also, William Tyndale's Biblical music is one of the main foundations of the English language.
You may notice I didn't mention faith and hope, two of Paul's big three. I'd replace faith with doubt and hope with reason in alea's ideal world.