Why feel sick about an awesome opportunity?
You could suggest to them that if they made a study of the Good News according to Paul, they would find far more answers than they can dare to dream.
This is what has opened many persons' eyes - such as Ray Franz and Martin Luther.
You could suggest they use the Watchtower library to search for and mark all the occurrences of the phrase "Good News" in their Bible, and note how many are by Paul.
And best of all, this innocuous approach will leave you untouchable, since they claim to be "publishers of the Good News".
(Why do followers of the Watchtower religion call themselves “publishers of the Good News” whilst unfamiliar with the “Good News” according to Paul, Moses, Isaiah and Psalms?)