Hi Chad,
That's a really tricky question, because while you do want to open their eyes you certainly don't want them to get defensive and shut you out, they have stay open or else it's no good in the long run. There is this one guy locally who I am trying to reach ever so gently, but then my approach is rather different.. Personally, I hope to emphasize self-evident truths any reasonable person would agree with as a contrast to what he is no doubt being drilled with at the meetings five times a week. I suppose for me it's a matter of trying to get them to come to certain conclusions so it wouldn't just be a matter of me saying so. It really depends on your folks and your relationship with them though. In any case, being on this board will no doubt give you some ideas. Welcome.
Mark