AnyFucker - she didn't, though.
This is just conjecture, and perhaps I'm wrong. But my impression is that you are a person who has engaged in a lot of feminist discussion online, and are consequently someone who has encountered a lot of 'trolls' with a tendency to express certain views as bait or straw targets.
So when you see someone like Toxic say something like "... something something ruins feminism something something..." you immediately go on the defensive.
But to someone (like me) who doesn't engage in discussion all that often, but who has clicked on this thread out of curiosity, Toxic didn't come across as a troll at all. She (?) came across as someone with feminist ideals who has had a fairly standard reaction to such an extreme article: annoyance that it might undermine 'more important/valid' feminist issues in the minds of people who aren't highly educated on feminism in general. She expressed this 'undermining' as 'ruining'. Some posters took offence to this and, I think, were quite rude and condescending as a result.
I, too, could easily have confused 'radical' feminism with 'extreme' feminism. It really isn't that difficult to just politely say 'actually, you're using the wrong terminology there'.