Path. I understand a little of what you're feeling at the moment and I am sorry for your pain. Try not to be too disheartened because the reality is that your family loves you very much. Speaking from the perspective of a parent there is virtually nothing in the world that could sever the love a parent has for their child. As well as that, we have glimpsed a little of your character and personality here on the board and can see that you are a person easy to respect and love. Believe me your parents love you for who you are!
They are just suffering from a great disappointment at this time. It is hard at the moment for them too because for your family this all still new, (it has only been a few months now since you spoke to your Dad, hasn't it?) They haven't really figured out to handle it all yet. They believe that the 'truth' is of great value and will serve you well, and they're disappointed at your rejection of it. They probably feel that because these beliefs are so much a part of who they are that you are rejecting them. Also they may be dealing with a sense of failure, wondering what they have done wrong in bringing you up that has caused this 'lack of faith' and 'falling away'.
On top of that they are suppressing all their instinctive feelings and emotions because they still believe, at this time, that this is what will help you the most. It is going to take some time for them to sort out this out and put everything back into perspective.
For me personally it took my family a while to come to grips with the situation.