Dude, that's true of most fanbases though. Is the Taylor Swift fanbase fascist? Are the crazy people obsessed with barely legal actresses fascist?

When people like something a lot, they identify with that thing. Any attack on the thing they identify is an attack on them, and they feel like they have to defend it in proportion to how much they identify with that thing. Shame can come into play too; if they both identify heavily with the thing they like and are also ashamed of it, knowing it isn't acceptable by society? Very intense reactions.

That's just human psychology. These women have a fantasy they use to escape the reality they very much find unenriching. People do that with alchohol, drugs, and a whole list of other far more destructive habits.

I think its okay if a woman wants to read some smut, and understandable when they get upset when someone says something bad about their smut.