Kennedy we know was for media purposes a show President who behind the wholesome and athletic image of American family, was in fact a mild cripple (Addison, his back, lots of drugs, Marilyn Monroe, Mimi, etc.).
The above combined with the eldest Kennedy male dying during a near impossible WWII mission, Ted Kennedy's Chappaqua, RFK's targeted assassination, and capping it all off in the 90's with a skiing accident and death and a plane crash killing two women on board, would seem conclusive enough proof that the Kennedy legacy was largely fabricated and that Kennedy men carry a gene which predisposes them to self destruction,along with dubious impact on the American culture.
The Myth was made possible by a huge endowment made to American Liberal Institutions which continue to propagate this Myth.
By the way, why are Liberal Democratic Presidents of this era referred to by their initials: RFK, JFK,LBJ and Republican Presidents are not: Ford, Nixon, Regan and the first President Bush.
Thankfully we are doing the lberal historians a turnabout: GWB
Having appropriated the W, Dubya has outdone the 3-initial dems alphabetically, too..