There is no magic bullet that will reach a Mormon or a JW and get him or her to think. If you are willing to invest a great deal of time in study and build a relationship, which could take years, you may be able to make a major change in that person's life. There are links on this site to take you to books that you can order and other sites which have significant historical and archeological information. To be serious about helping your friend, you must make a major commitment of your time and resources. You will need to understand the mind set of an individual who is an authoritarian group.
Love can work miracles.
Ask them in the beginning if they would even want to know if the church was a hoax. Many members would rather not know. This site hardly bashes Mormons. We are talking about ourselves and what we have done with our lives. We are moving on with our lives after having been Mormons.