text: who was really behind the jfk assasination? please remind me- who was it that was the fall guy? he was killed by jack ruby, correct?  were there three rifles used to make the shots? were they all from different vantage points?  why did they kill kennedy? lee harvey oswald    conspiracy worldview  kennedy was a threat to many interests.  kennedy was going to withdraw from vietnam.  administration officials knew there was a conspiracy, or were actually part of it.  the administration feared the public learning about the conspiracy.  the warren commission was a coverup.  when bureaucrats keep documents secret, it is to conceal wrongdoing on their part.  conspiracy thinking results from government lying and scheming.   lone assassin worldview  kennedy was a rather conventional politician.  kennedy had not decided to withdraw from vietnam.  administration officials believed oswald to be the lone gunman.  the administration feared the consequences if the public came to believe that a communist nation had kennedy killed.  the warren commission sought the truth — although it was excessively sensitive about matters relating to national security and the kennedy family.  bureaucracies have a "culture of secrecy" that leads them to conceal records for no good reason, and where good reasons for keeping secrets exist, bureaucrats interpret them too broadly.  conspiracy thinking results from a psychological process: people are unwilling to accept that the assassination had no broader meaning.