Seeing the discussion about this get censored heavily was enlightening. The modlog had some of the best comments.
Imane Khelif is an intersex man that has the advantage of male puberty because he has XY chromosomes. He, like many intersex men, was born with ambiguous genitalia that looked like a vulva (but almost certainly didn't have an actual female reproductive system). He was AFAB in the correct sense of the term, but is relying on incorrect paperwork to compete in women's boxing.
Lemmy should be horrified at a dude punching women, not providing a smokescreen by saying "But Russia!". The IBA had the tests done by independent labs that confirmed he is male, possibly with a DSD. They're corrupt, but not in any way that affects this. If Khelif wants to prove them wrong and ensure that nobody ever believes the IBA ever again, he can get a simple cheek swab and show the world.
Sex is not hard. XY is male, XX is female. If something goes wrong with that, then you're intersex. Leave women's sports to women (XX). Intersex people can compete in men's sports. Anything else is going to push women out of sports completely, because they have a biological disadvantage against men. If the Olympics doesn't re-institute sex testing, we're going to end up with "Men's" and "Men with DSD" divisions.
I used to follow him on Facebook. I think Facebook will be a little better without him.