9/11 Conspiracy Theories Prosper
The argument is: this is not a trivial matter. JFK assassination conspiracy theories opened the way for travesties of justice like the Garrison investigation.
9/11 conspiracy theories tend to obscure the actual nature of the conflict we are now in. They tell us, in effect, “radical Islam isn’t the enemy, the U.S. government is actually the enemy.”
Which is a recipe for a complete inability to deal with radical Islam.
Clearly, a lot of the conspiracy mongers want that.