Preaching to the Perverted

The main character in this movie is a naive young computer technician. He is a member of a religious group, and it's leader have declared war on a local BDSM club. And thus, our hero is sent there to spy on the "perverts".

As our hero settles in his new community, Hilarity Ensues as the cultural clash keeps crashing down on him and he's increasingly torn between his two worlds.

Has examples of:

 * Anvilicious: The political aspects are very heavy-handed, but probably not for political reasons.
 * Casual Kink: Life in the portrayed BDSM community.
 * Ethical Slut: Several characters at the club.
 * Enemy Mine: Groups who hate each other (conservative christians and radical feminists), ganging up against the BDSM club.
 * Heteronormative Crusader: The villain.
 * Moral Guardians: The villain's faction, including the main character. And no, the faction is not sympathetic at all.
 * Safe Sane and Consensual: The mistress explaining BDSM to the newcomers.
 * Sex Is Evil and I Am Horny: The villain turns out to be a sexual sadist himself... one who have lived out his desires in a abusive way instead of the Safe, Sane & Consensual way of the club.
 * Was Actually Friendly: The film runs on this trope, with the protagonist being very surprised that the people at the club he's infiltrating turns out to be really nice people.