If you make a big statement about not being a Christian then it can come across as a cry for help, or at least something you feel concerned about and therefore there is still opportunity in your parent's minds that you can be persuaded otherwise. You are basically saying that the fault is with you.
If you are matter of fact about your disbelief and don't make a big deal about it, then the parents have an obviously much larger task ahead of them. They need to fundamentally change who you are and all the experience, questions and knowledge that you have built up. They will be far more likely to realise that you cannot be converted back to theism.
So I wouldn't make a big coming out speech, just don't hide your scepticism. That way the fault is with them for not being able to counter your objections.
If you are matter of fact about your disbelief and don't make a big deal about it, then the parents have an obviously much larger task ahead of them. They need to fundamentally change who you are and all the experience, questions and knowledge that you have built up. They will be far more likely to realise that you cannot be converted back to theism.
So I wouldn't make a big coming out speech, just don't hide your scepticism. That way the fault is with them for not being able to counter your objections.
