Is that if it sounds like a conspiracy theory it is a conspiracy theory.
A second rule of thumb is that if it comes out of Artic Beacon, Tom Flocco, The Barnes Review, American Free Press or similar then it is a far-right racist conspiracy theory.
Some names are easy. Willis Carto is a long time neo-nazi nutcase. Names like Szymanski are harder and I suspect like Walter Storch Szymanski is a pseudonym. But like the previous poster noted, a simple Google search will tell you whom he writes for.
Here's three good articles to begin with (Same author - Dr. Laniac)
http://www.dailykos.com/story/2005/8/22/03154/6289http://www.drlaniac.com/articles/view.asp?file=moreondisinfo.htmhttp://www.drlaniac.com/Articles/View.asp?file=DontBeFooled.htmThe person who has been doing the most research into the confluence of far-right conspiracy theories and the left is Chip Berlet of Public Research Associates.
http://www.publiceye.org/top_conspire.htmlFor a historical background, read historian Richard Hofstadter's The Paranoid Style In American Politics.
http://karws.gso.uri.edu/JFK/conspiracy_theory/the_paranoid_mentality/The_paranoid_style.html