An interesting take of the guidestones can be found here - in a book called Lonesome Squirrel (it's not a very easy book to find, might be worth saving it).

In it, Steven Fishman, who was in court for crimes commited, testified that his actions were encouraged by the church of scientology and that some of the profits from his crimes, would be returned to the church.

In the case, many folders of scientology documents were opened before the court, despite a huge backlash from the church, trying to stop this.

During this time, Fishman compiled all he knew about cos into a book: Lonesome Squirrel.

On page 111 of 631, we find this conversation:

"No, certainly not!", Wolly complained with great annoyance, because I was not allowing him to end off the conversation. "Ron came here some years before Xenu started dumping his undesirables here. Ron's landing party touched down in what is now Elbert County, Georgia. In fact, last June, I went there with Ron to see the place, and he decided to construct a monument commemorating the original landing site. He wants it to be completed by his next birthday, this March 13th."

"Can I go see it?", I questioned.

"It's not finished yet", Wolly stated. "All I can tell you about it is that it's one of Ron's personal projects that he has become involved with. He is not planning it as a dissemination program for Scientology. The name of it will be the Georgia Guidestones, and he's planning to turn it over to the State of Georgia when it is completed, so that it can be preserved as a state landmark and never be torn down. Ron just wants to commemorate the first landing site on Earth, that's all. He is very sentimental and nostalgic when it comes to history, although few people know it."

"Where is this place located?", I asked.

"It's in the center of a farm on a hill on Route 77, between Elberton and Hartwell, Georgia", he disclosed. "Right in the middle of nowhere. Ron always liked to go to Stonehenge, In England, and it's going to look something like that, but more modern."

"Won't his name be on it as the sponsor?", I inquired.

"He doesn't want that!", Wolly sneered. "When we went there, he told everybody that he was a former concrete worker named Robert C. Christian whose great-grandmother was from Georgia. It was a marvelous mock-up. Of course, he did tell Joe Fendley, the man at the Elberton Granite Finishing Company who is building it, that he was a war hero in World War Two, which certainly is true."

"There is only one thing that puzzles me", I said. "Why did he select the name Robert C. Christian?"

"Ha, ha, ha!", Wolly laughed. "You're pretty smart, picking up on that, without having done OT Seven yet."

"Well, now that I asked, why did he?"

"It was just Ron's way of getting back at Emperor Xenu for what he did to all of us. Ron has a very good sense of humor, as well as the capacity to use a a little sarcasm whenever he has to make a point about something."

"I don't understand. What does Xenu have to do with the name Robert C. Christian?", I asked, very puzzled.

"Xenu, like all the rest of us, picked up other bodies in his subsequent life cycles, and is far better known for one of his more recent identities."

"Why?", I asked. "Was he Hitler?"

Wolly looked at me as if I had just arrived from another world and didn't know a fucking thing. He shook his head from side to side as he gulped down his drink. "No, Xenu wasn't Hitler!", he answered. "He was Christ!"