By HELEN BARLOW [Editor’s note: For an alternative take on the assassination of JFK, see “The Real Deal JFK SPECIAL (18 November 2021)”, for comparison and contrast.] Oliver Stone has always been politically outspoken and at 75 he shows no signs of quietening down. During publicity for his latest project in Cannes earlier this year, the iconoclast director – and Oscar winner several times over – trained his ire on revered figures of both liberal and conservative persuasion, declining to moderate his scathing language even for a dead former Supreme…