If your parents are not ready to hear about the critical staff of the WT don't go to that process to speak to them. They will not understand. It is like trying to describe the colours to born blind person.
My dad passed way, and he was sad because I became weak in spirituality. I never talked to him because I knew the devasting results. I wish things were different. I know that I won't talked to my mom. She wouldn't understand. It will only cause more pain. This is one of the worst cults ever existed, and it is shame that many lifes and relations have being destroyed by the WT