Kieran
Paranormal Adept
In part, it may be wild speculation. In part the evidence is lacking, but I don't think Marrs is making it all up. There are independent sources for many of these theories. Whether he believes them, or just likes to tell a good story, is up to you to decide. But I don't think we need to attack his sanity. That's not on the table. Nothing in what he said, however outrageous it might seem, should make you feel he's less than sane.
Those theories are out there, but that doesn't mean they are factual, but he was outlining a possibility they might be true. Once you throw those theories out there to the public , some people are going to think there is some truth to these theories Gene. To me Gene at least, i got from the interview, he believed in some of those theories, that are crazy and lack real evidence. That would led me to question his sanity.