I personally believe the reason why so many things are not reported or talked about much is because it clashes with someone's belief structure. I suspect that a great deal of history and culture has been hidden or destroyed due to the fact that the individual working with the artifact felt that it did not fall in line with their religious beliefs. There has also been some question about the age of the Sphinx, which Egyptologists have balked at because it would alter things in the field of study and they don't want to have changes.
The idea that the Templars survived and are still amongst us, frightens people because the real Order knows stuff that would shake up the world's perception of history and religion. It is more agreeable for some to believe that Christopher Columbus, a Christian and probably Roman Catholic, discovered the "New World" so that it could be claimed under that banner. Does that make sense? I am unsure if I am explaining that well. There is a lot of evidence that the Norse people came to the North American continent long before Columbus and probably got along with the Native tribes here. Both religious practices of the Northern/Western Europeans and the Native North American tribes have a lot in common, which is something that was never discussed in any of the schooling I have had. And I've got a college degree too. None of this was hinted at. It also would bring up the possibility that the Northern/Westerm European culture was more advanced than what is being taught. I think this idea frightens someone, and it's been scaring them for a long long time.
I think it is really important that when mythologies of other cultures are discussed and researched that the person doing the research does not bring their own religious point of view into the research. Think about it, how many translations have been altered just with a few word changes here and there to suit an ideological need? I am disturbed to just think about that.