He's saying the use of the word "gay" is legitimate, Matt. He refuses to consider when and why the word arose in its current usage: his position is, because people say it, it is a good, right and true word. That is his position. He implies it to be reasonable, while refusing to reason. Then he implies that we are Scholastic anti-Palamites for thinking that reason is a good thing in its place.
Capp, you keep talking about "a demonstration", I say "Fine", and give you a demonstration - both the known traditional meaning of the word, the historical failed attempts to use it as a sexual euphemism, its resurrection in the '60's SPECIFICALLY to do what it has done, achieve social tolerance of the behavior, and the continued existence of the word "gaeity" for good measure, which is not as a matter of fact used to refer to sodomic desire.
You have no good response to that, no good response to the Flintstones, which kills any suggestion that people continued to associate the word with sexuality prior to 1970, you INSIST on defending a bad modern word, and then have the gall to imply that we are "modernist" for suggesting that we talk more like the Church fathers, or at least, our ancestors.
As Russians would say, "Фу!"