I don't know what site you mean, I read a single .pdf linked to in this thread that (imo) does a pretty good job of disseminating the available facts and images re: the Kennedy's and in so doing creates some pretty disturbing questions. It then presents some potential theories, some credible, others less so, and let's (You) the reader decide for yourself what to believe
I for one have always accepted the given narrative re: JFK and never really questioned it until reading the .pdf.. And this is from someone who normally questions everything..