'Believing' in the social construction of gender (or sex roles if you like that better) isn't a dogma, it's just a way to try and understand why people do what they do.
You see Frack, this is a classic case of the way you are not listening to anything we say, and systematically conflating two entirely different versions of the word "gender."
No-one, and I quite literally (in the literal meaning of literal!) mean no-one on this board disputes that "gender" in the sense of socially sanctioned sex stereotypes is a social construction. That's one of the absolutely central tenets of any sort of feminism - liberal, radical, 2nd wave, 3rd wave.
Socially sanctioned sex stereotypes are at the heart of the problem we all wrestle with as women. They're culturally and historically variable, constructed, arbitrary and act to oppress women.
No-one on here is disputing that.
What pretty much all of us are disputing is "gender" in the other sense - the idea of "internal feeling of gender", and more specifically, whether that idea actually corresponds to anything (whether it's some sort of neurological state of being or Layla Moran's gendered souls which she sees when she looks into someone's eyes). One can be a theist about it (they really are "out there" in some sort of Platonic realm, or in the structure of the brain or whatever), agnostic (just don't know) or atheist (they're simply a belief that some people harbour to help them make sense of the world).
You have to be clear about both what you're talking about, Frack, and what your opponents are talking about. That's (remembering my days as a lecturer) the difference between scraping a third and a comfortable 2.1. At the moment, frankly, you're reminding me of those of my students who only just scraped thirds. And bloody hell, I'm having flashbacks to just how tedious it was giving them tutorials.
Not the lack of understanding - I can forgive people struggling with difficult concepts. But the sloppy thinking. And the failure to engage. That's just unforgivable in someone in academia. And trying to cover it up with po-mo word salad doesn't help, it just obscures your muddled thinking even further.