I cited my sources for this back in comment #17 over two weeks ago. Here they are again:
https://badarchaeology.wordpress.com/2014/01/12/is-pseudoarchaeology-racist/
http://www.jasoncolavito.com/blog/the-astonishing-racial-claims-of-erich-von-daniken
https://www.splcenter.org/hatewatch/2018/01/02/close-encounters-racist-kind
Yes, of course there are plenty of people who repeat this stuff without being aware of its racist origins. I was one of those people when I was a kid and didn't know any better. I didn't know about the racial underpinnings myself until just a few years ago. As I said, the racism is deliberately coded. The whole point of dogwhistle rhetoric is that it looks innocuous except to the people who are attuned to the implications, which is how it slips under the radar and infiltrates popular discourse.
You're getting it backward. The supremacist foundations of the theory don't explain why it's popular; the popularity of aliens explains why supremacists promoted the theory as a Trojan horse to sneak their ideas into the discourse.
I'm quite confident that the makers of sensationalist TV shows like that don't actually believe the BS they peddle, any more than the authors of the sensationalist books I read as a kid; they're just con artists trying to trick their audience into believing it. They insert their nonsense into everything because they need fodder for multiple episodes.
Could be, I guess. But then, you'd expect speakers of the modern language to adjust the pronunciation of the name to fit modern phonetics, in the same way that I pronounce my own name using modern sounds rather than the way Χριστόφορος (Christophoros) would have been pronounced in Ancient Greek.
Yes. It doesn't prove Kirby believed in any of this stuff, any more than he was a worshipper of the Norse gods.