Hi Marisol,
As you know, but for the readers' benefit, you and I communicated by private emails the day your essay appeared, respectfully and thoughtfully, by both of our assessments, even though we disagree on some of this topic (by my own assessment). This private communication of academics has been going on for hundreds of years and continues on today and is a bedrock supporting the foundation of academia. I thought I would add a few comments here for public consumption.
If MSU requires a person to affirm that "gender is on a spectrum, not biologically based, and not-binary," as a precondition or requirement for that person to perform their work, then I agree that's wrong and should be challenged as such. On the other hand, if MSU only requires that a person check a box about own's gender, one of eleven choices that include "woman, man, ..., prefer not to specify, enter your own ____" then I don't think that in itself is demanding an affirmation and doesn't seem wrong to me. Allowing for a free-form response and the choice to not specify among multiple choices seems to me to be enabling freedom, not restricting it.
The Dawkins essay and the YouGov poll were interesting, and I thank you for linking to them. In footnote 1 of Dawkin's essay, he includes this wonderful sentence, "I am also only too aware of the elaborately planted minefield of constantly evolving neologisms and proliferating pronouns, through and around which academics in some humanities departments are obliged to tiptoe." I love that phrase "elaborately planted minefield" but would have not included the limitation of academics "in some humanities departments." The minefield seems to be in all of academia, although it makes sense to me that humanities departments would analyze these issues at greater length than STEM departments.
My impression is that your essay, as written, confuses or conflates sex and gender, and I figure I would give you the opportunity to clarify your thoughts on that here in the comments, if you wish to do so.
Respectfully, Peter