Lots of people on the left get accused of anti-semitism when they are nothing of the sort. Is it so hard to imagine that many "truthers" might suffer from the same thing?
With regard to the question, can't say I have come across much of that type of person mentioned in the OP, but I don't doubt they exist. There is a whole world of weirdness out there.
I would not object to being called "left wing" or "new age".
There are plenty of reasons to be anti establishment at the moment and plenty of arse-about-face narratives out there competing with more sensible ones. I consider it something of a failure of the left if they consider the arse-about-face ones are winning so many people over. A lot of the "Youtube" generation of knee jerk conspiracists are basically won over by US stuff of the Alex Jones type (although there is an amusing row between him and the maker of Zeitgeist up there somewhere) Where is the left equivalent of this stuff? (I know there is some, but have we really mastered it enough? seems not)
Zeitgeist itself is very overrated, not without it's good points but to try and build a "movement" out of it? Proper daft. One conspiracist, a hippy (not a right winger) called Freeman Fly (not Freeman of the land connected, just a funny pothead who goes on about some very far out stuff as well as being into permaculture basically rather a Kropotkinite without saying as much) pointed out that the Venus Project (a zeitgeist "solution") has curiously few humans in it....
Anyhows, the most bugging thing about the kneejerk conspiracists tends to be their SHEER FUCKING ARROGANCE. A few Youtube movies and they think they have the secret to the entire history of humanity , the of us being just fucktard dupes. I have spent years watching those movies, some have merit, some don't, some I don't know. But I am always happy to have my opinions swung.
Politically, too many of these people are vague and drifting - I wouldn't call them right wing per se, but it can be a recipie for conservatism.