Filmmaker Paul Haggis (Crash) has reportedly resigned his membership in the Church of Scientology over the church’s support of California’s controversial anti-gay ballot initiative Proposition 8. Ex-Scientologist Mark Rathbun published a lengthy letter said to be penned by Haggis to Scientology representative Tommy Davis on his blog.

Reps for Haggis and Davis could not immediately be reached for comment; The Hollywood Reporter has reportedly confirmed with “a friend of Haggis” that the letter is real. Read the whole letter at Rathbun’s blog.