I do share Dr. Peterson view on Calvinism. As a believer in the Book of Mormon, but not LDS, I wouldn't approach them with this view as a warm up session. :) I would, as any Book of Mormon Believer should do, invite them the read the Book of Mormon and pray to Heavenly Father about it, waiting for the fruit of the Spirit to confirm it's validity. I would then share the verses that speak of how Jesus invites ALL men to come unto Him and how we are not merely creatures to be acted upon, but we have a choice whether to follow God or not. By the way I love Pastor Mark, he is just simply wrong on this issue.