I'm with undercover. I have never been able to understand why the promotion of religious beliefs is given tax exempt status. Freedom to worship/believe as one sees fit has nothing to do with freedom from taxes. If that was the case, then my paying income taxes violates my freedom of speech. It's a nonsensical argument.
Religious organizations are even held to the same standards as other not for profits (in US). Of course, the famous Jimmy Swaggert case which ended up leading to the WTS going to a "contribution" basis on the literature is one example where the government did say that you can't run a commercial business under the guise of religion.
And, didn't that Bob Jones university lose their not for profit status because they discriminated against minorities?