It does not appear to me that Richman is a Truther in any sense that we use the term on this forum.
In your original link to the right-wing Independent Sentinel, there is a link in the sentence
CNS News reports that the Socialist Party are Truthers.
this leads to the CNS News article
Socialists Doubt Bin Laden Behind Attacks on US
CNS News is described in its Wiki as
formerly called the Conservative News Service, is an American news website owned by the Media Research Center
The Media Research Center in turn is described in their Wiki as
is a conservative content analysis organization based in Alexandria, Virginia, founded in 1987 by conservative activist L. Brent Bozell III. Its stated mission is to "prove — through sound scientific research — that liberal bias in the media does exist and undermines traditional American values" and to "neutralize [that bias's] impact on the American political scene"
L. Brent Bozell Jr. (that's the father of the current president) was widely believed to hold strong support for the conspiracy group, the John Birch Society...
from his Wiki
...making him absent from the Palm Beach decision of Buckley, Goldwater, Russell Kirk, and William Baroody Sr. to freeze out the John Birch Society from the conservative movement. Kirk inferred that Bozell would not have had any reason to be opposed to the decision but in fact he, along with Frank Meyer and William Rusher, protested the exclusion of the Society from the conservative movement.
To return to our so-called Truther, Shaun Richman, in the CNS link, it is "proved" that Richman is a "Truther" through this statement,
"I refuse to believe that Osama bin Laden...is behind all of these things he's been accused of," said Shaun Richman, the co-vice national chairman of the Socialist Party USA.
The CNS article goes on to say,
Richman pointed to a recent Washington Post article that indicated the Sept. 11 hijackers may have been an isolated cell," acting alone. "Most of the people who planned it (Sept. 11 attacks) died in the execution of it," he said.
I couldn't find anything even in the CNS News article that claimed he is a Truther that he is in fact a Truther - although he is clearly as much an apologist for Islamic terrorism as is Ron Paul.
Richman has a blog.
http://www.shaunrichman.org/?p=80
I did not read the whole thing, but a blog search found this page for his posts that contain the term "9/11"
http://www.shaunrichman.org/?s=9/11
I couldn't find anything where he says anything Truther-like.
So I'm left wondering why
njslim would be repeating rumours like this that appear to have no truth value in them at all. Are you part of a conspiracy to discredit socialism in the USA? Are you a member of the John Birch Society? Is this disinfo to make hard-core conservatives look bad by making it look like they don't do their research properly?