Honestly, and don't throw things at me, but I think this whole "feminist orthodoxy/narrow minded" thing is subject to feminist analysis in and of itself.
E.g.: I disagree with Sakura on a regular basis, and with Dittany on a slightly less regular basis, and I've never felt shouted down or censored. I'm not a radical feminist, but I am an active feminist who engages in this section very regularly.
I think women are socialised to back away from robust debate - I think it's yet another area in which standing up for an unpopular viewpoint is considered unfeminine and therefore trained out of us. Certainly my male best friend and I have much more fun debates then any of my close female friends* and I think it's because, when faced with open disagreement, even very intelligent, independent women tend to concede, or at least try and appease ("let's agree to disagree"). It's social conditioning.
So a feminism section tends to attract women who refuse to play by those rules. One of the reasons that so many of us are annoyed with the WhatAboutTheMenz/101 crap is that it's not just about educating and it's not just about tone, it plays into the narrative that encapsulates the problem. You are a woman therefore it's your role to be an emotional caretaker, to care about the tone, to manage the interaction, to take responsibility for the anger of others.
Given all of the above, I think that part of the issue here is that feminists want to engage in the sort of rigorous debate that you get when you stop worrying about being nice, and feminine. And it's often misinterpreted as hardline, or aggressive, or imposing our views on others (how many times have we read that the women on this section lambast poor unsuspecting readers for wanting nice underwear? has that ever actually happened). And I think it's because women expect other women to play by the patriarchal rules - which in this context means saying "just my opinion, lol" a lot.
I think that if women didn't experience this section as hardline, as shouting them down, as aggressive? We'd actually be doing it wrong.