Speaking of "ridiculous bad Stargate episode", look up Battlefield Earth, a movie adapted from one of L. Ron Hubbard's books. He's the founder of Scientology, and of course, the only people think that it's good are Scientologists.
It's a modified cross with another cross in it. Critics call it the Church of the Double-Cross. It stands for the 8 fundamentals, and it gets its source from the Rosicrucian cross, which is one of those magician/weird organizations in the past.