Wouldn't it be awesome if an extraterrestrial came down to earth and told everyone they made up the concept of god and we're all a bunch of idiots for believing in god rather than science? Maybe they would clean the planet up for us? Yeah, that'd be asking too much.
The only problem is that there is no proof of such beings. I studied it all in my younger days and was a believer of many things but we have no proof of anything supernatural or extraterrestrial. Oh, I know. The Navy recently admitted that UFO's on film that they had were real "aerial phenomena." This does not mean that there was a craft from another world piloted by beings of that world.