I can't claim to know how it happened, though I am, and have been, thoroughly convinced that the official explanation is not possible.
But I still don't know what the difference is. Before 9/11, gov't = non-existent/immoral, people still loved it. After 9/11, gov't shown yet again to be immoral (if not non-existent), people will just wipe it off as "wrong guys in charge". I guess I'm with Greg -- what's next? What does this knowledge do? If tremendous effort is expended to get make this particular truth public knowledge, is the result an incremental step towards a stateless society?
Right now, my feeling is "unlikely at best".