I'm going to put my opinion out, because I feel I need to do so.
I do not believe in an ancient or worldwide cult that is pulling the strings behind the scenes of everything in order to gain some sort of world dominance (that they theoretically would already have if they were that big). I've seen the theme used over and over again in various media types (movies, books, video games) and while it can make an awesome plot, the human race doesn't have that unified of a mentality to be able to have a multi-cultural shadow society manipulating events in thousands of places at once. The type of Alpha personality that would be required to run a branch of something like that wouldn't take well to the "chain of command" for a long period of time, before thinking that THEY deserve to be a higher leader, and the in-fighting will eventually cripple the whole group. I mean, if you want to see what a bunch of "alpha" personalities does when you cram them all in a room, look at a local city council, or the U.S. Congress. They're lucky they can agree on what to have for LUNCH, nevermind what they want to do policy-wise. Every secret society ended up having a massive amount of in-fighting pulling it apart in the end, at least any that showed in history books.
As for the "significance" of certain things, I once read a book, and though it was fantasy novel series the opinion is still valid. The difference between Omens and regular happenings in the world lie in the perception of them. Not every gust of wind, or clap of thunder, or fall of the dice has cosmic significance. The trick in deciphering omens is figuring out which IS an omen and go from there. But, we don't live for nearly 7,000 years and can't really learn the nuances of things like that. Not to say that I don't believe in Signs...but I don't act JUST because of what I think is an Omen. I back it up with other information.
I'm not burying my head in any kind of sand, be it toxic or not. I just don't think that human nature would allow something like you've mentioned to exist, simply based on observation of human ego.
You say "Witch" like it's a bad thing!