I agree. I think for me, this is the issue with a person in authority being trans - the sexism is baked in to their personal belief system. Its a feature, not a bug. Their entire belief system is predicated on there being a right way (and therefore a wrong way) to be male and to be female. How can that not affect their policy decisions?
In theory, it should make no difference whether or not the candidate is trans. But its not the same as any other belief and I can't 'respect the person while not sharing their beliefs' - because they'll inevitably expect me to participate in those beliefs / inflict them upon me to a degree. I would feel the same if a public official was a fundamentalist religious person, or a militant animal rights activist - I'd be concerned that their overt beliefs would impact on their policy making in a way that I don't agree with.
That's not to say the other candidates don't have beliefs but if they keep them to themselves, we can't comment on them - we can only comment on what we know. A man might have sexist beliefs. A TW definitely does.
As a pp said upthread, we would be permitted to freely discuss these other aspects of a public official and their potential affect on their policy stance without being accused of hate speech.
Regarding 'discrimination' , it has rather become a dirty word but it just means 'to notice a difference'. I have just ordered a flat white, and in doing so have discriminated against tea! Some forms of discrimination, mainly to do with how people are treated with regards to employment and services are illegal and rightly so. But its not illegal discrimination (yet!) to notice and discuss the difference between elected candidates. Voting is like dating - the ultimate non equal opportunity activity. Anyone should have the right to stand, nobody else has to vote for them.
I don't agree that we should police discussion on this forum in case some hard of thinking people think badly of gender critical people because they can't tell the difference between hate speech and discussion. That's heading towards purity spiral thinking. This is one of the only corners of the Internet where discussions around gender and sex are permitted, more specifically, their impact on women. Long may it continue.