MSIL: I can see why this UN issue hit you so hard. I don't blame you for being angry. I am angry too and I didn't go through what you went through. If your dad is walking around saying, "It can't be true, it can't be true." It is not such a bad thing.
He read the information. It will take time for it to sink in. He will pay closer attention. The way the WTS responds to this issue may be the thing that makes him want to leave. Just be patient.
On the other hand, my sister would not even sit with me or read anything from me. So she will never have the information in her head to make her think. At least your dad knows. She doesn't have a clue.