Having only a passing familiarity with Slate Star Codex, I can't claim to have much knowledge of the context here. However, using information gleaned from this comment alone, I would say that polite steelmanning is probably the default reaction to a lot of things as far as LW readers are concerned (this is obviously and sadly untrue outside of these circles), and that if feminism, social justice, and Tumblr were reacted to with genuine disgust, something probably happened to justify that disgust. If I'm wrong about this, feel free to inform me.
Through LessWrong, I've discovered the no-reactionary movement. Servery says that there are some of you here.
I'm curious, what lead you to accept the basic premises of the movement? What is the story of your personal "conversion"? Was there some particular insight or information that was important in convincing you? Was it something that just "clicked" for you or that you had always felt in a vague way? Were any of you "raised in it"?
Feel free to forward my questions to others or direct me towards a better forum for asking this.
I hope that this is in no way demeaning or insulting. I'm genuinely curious and my questioning is value free. If you point me towards compelling evidence of the neo-reactionary premise, I'll update on it.