It isn't my specific goal to destroy my Dad's JW beliefs but I do point out fallacies if he brings up topics for discussion. His mind is not working properly these days so he is unable to argue points. I think he knows there are issues but he is unable to deal with them. He has stated recently that he doesn't understand what they are saying at the meetings.
My goals are:
1) To help him as he moves through these final stages of life.
2) To ensure that if anything happens to him that he receives proper care.
3) To try to show him unconditional love.
4) To give him some happiness and joy from outside his oppressive belief structure.
5) To present an example of a 'worldly' person who is not evil.
Once my Dad is no longer alive, I don't want to look back and say that I should have done things differently. I want to choose now the right and loving things to do and act upon them. This is also what I tried to do when my Mom was alive.