Jim Carrey's Girlfriend Cathriona White -- Don't Pin Her Suicide on the Church ... Scientology Says

The Church of Scientology is firing back at accusations it had anything to do with Jim Carrey's girlfriend killing herself -- saying no one blames the Bible when a Christian commits suicide.

Cathriona White was reportedly very active in the Church of Scientology ... taking part in a program called the "Purification Rundown" -- a controversial drug and alcohol detox program combining exercise, medication, and sauna sessions.

But a Scientology spokeswoman tells TMZ any reports connecting White's death to the church are a "sad and reprehensible" way to exploit the tragedy of her death. She also calls it "outright bigotry" because it's "like saying a person who previously studied the Bible committed suicide."

Law enforcement sources tell us investigators will question church officials about Cathriona's involvement in the detox -- but at this point they strongly believe her death had nothing to do with Scientology.