We also know that sexual abuse at a young age is HIGHLY correlated with being gay later in life

To play devil's advocate, I believe all he's saying is that the capacity for developing a philia for same-sex relations exists in everyone. There's no "gay gene" or "gay switch" from birth. As men we think we aren't into that shit and it's so foreign that we can't understand how a guy could kiss another guy. Some of us even admit that women are naturally "bicurious" but that it doesn't apply to bros. We see two dudes getting it on, we have a natural revulsion. While there could be a sex difference, it's mostly learned for both sexes. Anybody could be conditioned to like anything, especially from a young age. That's why grooming is so essential to propagate their degenerate lifestyles to the next generation. At some point your preferences will become more or less "locked" in place.

As far as Kinsey goes, you don't need to read that pervert's research to conclude that if the above assumption is true, there will be a spectrum of that conditioning in every individual based on their unique upbringing and experiences. So some people will be more amenable to developing same-sex attractions than others. That position on the scale is also locked in at some point. It's not a binary switch. That doesn't mean we can't define gay and straight as a binary without issue, based on behavior or stated preference. Zodiac can correct me if I misrepresented his or her position.

That information is older than modern identity politics so I highly doubt it.

If we were to discuss rise of transgender leaning feelings however.....