If a person legally changes their name (forget gender, only name), and you refuse to use it, and insist on using the old name even after requests to stop, at some point that would become considered malicious and become harassment.
But ultimately because society and science deems that "name" is not something you're born with, but a matter of personal preference and whims, it's not a crime. You'd be an asshole, but not a criminal.
However, society and science have deemed that sexuality and gender are things you ARE born with, mostly hetero and cis, but sometimes not. So if you refuse to acknowledge these, you are committing a hateful crime against someone who doesn't have a choice in the matter.
You can disagree. But then don't claim that "you are happy to let anyone identify as anything", because you're not, not really.
> Men are competing against women (and winning). Men are winning awards and accolades meant for women.
One woman. Almost all examples everyone brings up are based on Lia Thomas [0]. I have yet to see other notable examples, never mind an epidemic of men competing against women in sports.
[0] https://en.wikipedia.org/wiki/Lia_Thomas
> Men are going into women's changing rooms. There is a concerted effort in public schools to normalize this abnormal behavior.
Are you talking about transgender people, or are you talking about bad faith perverts abusing self-identification laws to do this?
Because if it's the former, are you asking https://en.wikipedia.org/wiki/Blaire_White to use men's changing rooms, and https://en.wikipedia.org/wiki/Buck_Angel to use women's?
If it's the latter, no denial that perverts and bad faith exceptions exist. But those people never needed an excuse to hide in women's toilets. Trans people have been using the bathrooms of their confirmed gender for decades. The only thing that's changed recently is conservatives decided to make this their new wedge issues so butch women and mothers with male children with mental handicaps that need bathroom assistance have been getting harassed.