Suse, my personal take on this question would be that I would not want to drive my child or grandchild away from me and if discussing religion would do that then I would leave the topic alone. That does not mean that I would be happy with their choice, I would probably be devastated that they have chosen to reject what I believe to be the only way to salvation and have therefore chosen eternal death (OK people, just stating what I believe, no judgement intended). Nevertheless I would continue to love them. Oh yeah, and also pray very hard that their eyes might open and they would return to the faith they were brought up in.