It's sad because 20 years ago his son just would have been a wimpy little fag twink. Sure, dad would have been disappointed still but once he got over the weirdness he'd still have his special little guy to do father and son things with.
Then one day when his son brought home his macho, bearish, boyfriend he'd have a son-in-law with which to chug some brews while watching the game and swearing at the TV; while mum chides, with a laugh, at the bonding "To think you were freaking out about this five years ago!"
Because there was at least little strands of normalcy for even the most rigidly traditional father to grasp on to.
Now, enter the honk-honk shit of the 2010s.
All bridges to normalcy have now been burned. And you can see it in his face- he's thinking about strangling them and then putting a round of 00 buckshot through his brain. Pain, and violence replace disappointment and eventual coping.
IT'S SO SAD FRENS