Unfortunately, an anomaly that is used to physically harm gay men. Gay men are assumed to be trans women and so are forcefully given gender reassignment surgeries (note, for trans people, it's gender confirmation surgery).
Gender identity and sex preference are conflated. Whereas in the west, being gay is generally more accepted than being trans, it's the opposite there. Still, it's a sign for humanity that no matter where in the world, or how culture is, there are trans people and gay people living their lives. And some societies have adapted to welcome them, even when they haven't fully. It gives hope for the future, even if it's scary now.
And our legal system.
Ending borders is a noble ideal but it's not currently practical. People need many of the services their country provides, like healthcare, elderly care, pensions, unemployment assistance etc.
With no national boundaries, and no alternative system in place, society as we know it collapses.