Why is it that some males get angry when they are told no?
I have no idea, last time I checked I had a mostly functioning female anatomy. Are you rather unsubtly suggesting otherwise? Because that's against MN's guidelines isn't it?
Breastfeeding support groups, post natal depression groups, too, are exclusionary as they're female only.
Indeed they are, and if you advertised these as a library activity you'd probably only get xx chromomed peopke who'd given birth attending.
Why is it so hard to accept that women want spaces where we can be women on our own? It's not the end of the world if everybody isn't admitted to every last space everywhere.
Because there is no reason to exclude men or transwomen from a reading group in a library that reads feminist texts. There is nothing inherently female about wanting to read, discuss and learn from a feminist text. They are not the sacred texts of a religion. They are interesting pieces of writing that can be accessed by everyone.
If you want to have a women (as defined by MN (tm) ) -only reading group then do it in a pub, a hired room, a cafe, a park or a hot-air balloon, but not a community library.