he had a step mom who was LDS and he seems to have an axe to grind against mormons and he's also executive producer of the HBO show "big love"...

http://www.foxnews.com/story/2009/01/23/tom-hanks-apologizes-for-calling-mormon-supporters-proposition-8-un-american/

Interestingly enough, Tom Hanks was briefly identified as a Mormon (although he was not baptized) when his stepmother Winifred joined the church. However, his father Amos was not interested in the Mormon church, and according to an unauthorized biography, Tom saw this as one reason they split up. Tom stated later that he was no longer a Mormon, and he also believed his ex-stepmother had left Mormonism. Tom made his way through several different religions over time as you can see here.
http://mormonmatters.org/2009/03/11/does-tom-hanks-hate-mormons/