If there was a literal Garden of Eden, and if it was in this plane of existence, on this earth, then we would have found it by now. So, the only possibilities are that either it was not a literal physical place, or that it is NOT in this plane of physical existence. What you are describing as "not in our physical", and your reference to what Stephen say is exactly what I mean by not being within our physical universe. It is within an arm's reach, but not at all someplace within our physical universe. Heaven, as shown with Stephen, is NOT somewhere up in space, but in another plane of existence altogether.
I think AiG used some fairly blunt language with Hovind, and definitely criticized what he was doing, but neither they or I ever called anyone an idiot. I did call the entire UFO and space alien stuff a bunch of idiocy, meaning the entire concept was entirely unworthy of serious discussion and consideration, not that any who actually believed were idiots. This was not a personal attack, it was an attack on the utter irresponsibility of associating legitimate and SERIOUS issues like demon activity which such wackiness. It does, indeed, show where their standards of "scientific" grounding are.
The problem with AiG is that they refuse to admit their mistakes when pointed out to them. People like Glenn, who used to be one of them, will point out the errors in their science, their misrepresentations, etc, and they just ignore it. Eventually, they have to abandon their positions, but not for years sometimes, and not until after they have infected the Christian body with their loose theories and bogus claims.