$DWAC. DALLAS — QAnon true believers gathered en masse on Tuesday morning in anticipation of the return of Camelot — namely, of John F. Kennedy, Jr., the lush-haired scion and former George publisher who was killed in a plane crash in 1999. The crowds chose to meet in Dealey Plaza and lined themselves around the large white “X” that marks the spot where his father, John F. Kennedy, was assassinated in 1963. Dozens wore Tiffany Blue, a color associated with the Kennedy clan, as well as shirts that read “TRUMP/JFK JR 2020.”