This probably won't be popular but it is true nonetheless.
What has happened is that people, on the both the right and the left, bring up legitimate concerns with regards to gender diversity issues. They're concerned that we might be going overboard with preferential hiring, they have concerns about men and women's showers and the like, and while there are often answers and discussions to be had around these issues even if you don't agree with them they are legitimate
But instead of treating them like legitimate issues and engaging with people that have these concerns unfortunately the transgender advocate community and many on the left have lashed out and basically called anybody who has questions about any of this transphobic scum who need to be locked up and should be disposed of and silence and any other nasty names they can think of.
This tends to polarize these positions and people start feeling attacked and they tend to move into the anti-transgender camp. A child is banned from a school just for saying he believes there's two genders 100 parents out there start thinking the things have gone too far and if they see a chance they'll oppose this
Then you wind up with two sides. And there's never any discussion between two sides, it's just us versus them and them versus us.
And once that takes hold it's really hard to beat. Unfortunately transgender rights issues got handled very poorly in the last six or seven years and now there's growing opposition that's not being driven by rational concerns but rather tribalism