You might want to re-read the conclusion of the article at the link, in which Paul Kengor says that --- in the light of abundant evidence that Pope Francis has, and has always had, PUBLISHED, orthodox Catholic beliefs about marriage and sexuality --- it's not so much that Pope Francis is duping the Elton John types, but that some people are just so eager to be duped.
Some folks (right and left, inside and outside the Church), and despite abundant evidence, think Pope Francis wants to OK gay marriage. They'll be disappointed. I pity them. What they lack in intelligence, they make up for in stupidity.