Use the message - don't kill the messenger.
Here is what I found re: Will Smith and Scientology on Wikipedia:
Smith has said he has studied multiple religions, including Scientology, and he has said many complimentary things about Scientology and other faiths. Despite his praise of Scientology, Smith said "I just think a lot of the ideas in Scientology are brilliant and revolutionary and non-religious"[27][28] and "Ninety-eight percent of the principles in Scientology are identical to the principles of the Bible.... I don't think that because the word someone uses for spirit is 'thetan' that the definition becomes any different."[29] He has denied having joined the Church of Scientology, saying "I am a Christian. I am a student of all religions, and I respect all people and all paths."[30] Smith gave $1.3 million to charities in 2007, of which $450,000 went to two Christian ministries, and $122,500 went to three Scientology organizations; the remaining beneficiaries included "a Los Angeles mosque, other Christian-based schools and churches, and [...] the Yitzhak Rabin Memorial Center in Israel".[31] Smith and his wife have also founded a private elementary school in Calabasas, California, the New Village Leadership Academy, which has attracted controversy and speculation over its use of Study Technology, a teaching methodology developed by L. Ron Hubbard, the founder of Scientology.[32]