You probably got a good education there cos it's a good school and that's all that should matter, religion belongs in church IMO, if folks want to practice then attend on Sundays or whenever the fancy takes. Leave schools to teach kids their necessary education. We have to do something about this now, argue all you want but separate schools has a major effect, no question about that.
Parents always have the ultimate responsibility of course but splitting wee Johhny up from his best pal from nursery at the age of 5 cos he's a different religion only teaches the kids that they're different and fuels the fire in later years.