The following story is a translation from Hungarian, with a lot of discussion in the blog's comments:
The story in a nutshell:
In the 1960s, a guy called János Móricz (Móricz János in Hungarian order) discovered Indians in South America that he could speak Hungarian with, because their native language was so similar. He concluded that Hungarians and these Indian tribes were one nation in the not so distant past. More recent DNA analysis confirms this. For some reason (conspiracy of world-domination-hungry Mormons) his discoveries never reached the general public, the press intentionally silenced him, academia refused him, etc. He also found a cave system spanning the entire Andes, containing an ancient metal plate library documenting the whole history of humankind, and the ancient cosmic secrets that are kept secret by some powers.
So how can we verify or disprove this?