Now he is straight, married and judgmental as heck against people of other religions, gender identities and especially sexuality.
I wouldn't out him for that, even now. But should I remind him that I remember? It's never been brought up since.
(They aren't on G+ or I wouldn't have posted the question here).
Very likely he's in denial because of his religious beliefs. He's countering hard becuase he doesn't want to admit to his own non-standard desires. This is common with extreme homophobia covering up homosexuality. Likely he did confess his desires to someone else and was punished or shamed for it to the point that he decided to build this wall of shame and vitrol to cover it up. Likely he'll react poorly to anything you say so it really depends on if you want to maintain your friendship.