I do think that there is more to it than meets the eye.
I am not into CT or NWO theories, but those who are to this degree, I really do believe that there is an underlying issue.
I have, what I call, a little obsessive streak. And this manifests itself very obviously when I am going through a tough time. And because I have had a lot of those the last few years, I have picked up on it.
If I am working through some trauma and I just happen to need something new, (the latest was a new blender) then I will research the crap out of every single blender available. I will download the manuals, read reviews, shop around for best price etc etc. And then in the end I went for the first one I had my eye on anyway.
My current obsession is spf as I recently got a postive skin cancer result. I have bought any and every offer that is going, there is not a brand or an offer I don't know about right now.
These are just two small examples, but I do feel quite strongly that if someone is going through some trauma / ptsd or similar then they do try to find something else to focus on. Unfortunately that focusing can get out of hand. I know I have this problem (I have a stockpile of a year of coffee as for some reason I felt very unsecure about running out).
The problem is identifying an issue. I am aware of mine now so I am able to step back and say to myself, enough now! . But then I need something else to focus on. So now I'm working on getting fitter. Which seems a lot better option. But unless you know to change it, it is very difficult not to. It can consume you.
So I don't know the answer of what to do OP. But perhaps there is something similar happening with your DH. But I do know the feeling of something being completely consuming. I would related to as similar to an addiction.
Did he have a tough upbringing? Has there been unresolved trauma?
I am no doctor or psychologist, I just speak as someone who can relate a little.