Not allowing the existence of RC schools (or any religious school) is not discriminatory at all. What right does any church have to be teaching children in the first place? You are a church, a religion, a belief system (and a very selective one at that). School lessons should be academic. And it does not follow logically from that that churches should be banned. That's just silly. By all means a person should be allowed to go to a church if they wish. You can choose to go to church in the same way that you can choose to go to any other building. But a child can not legally choose to go to school. They have to go. So therefore they should not be brainwashed while they are there.
This notion that by being a church you somehow have the right to steer a child's mind within a captive school environment is so anachronistic and damaging.
I wonder why many non catholic parents send their kids to catholic schools? You talk about religion like its so bad. There so much evil in the world which is not connected to religion. In many ways because was brought up a catholic I learnt good moral values. That in many ways has gone out of the window these days. Yes we have more tolerance but not to all sections of society. There's still tons of discrimination, like against the unemployment, people with mental health problems.