So, your new colleague says their name is Richard. You decide it’s hilarious to call him “dick” and refuse to stop even after he’s asked you multiple times.

Pronouns aren’t any different - if you had a masculine looking female coworker at work - say she was into bodybuilding - and you keeping calling her “he” as a “joke”… persisting when you were asked not to, by your boss, by hr perhaps even. What kind of person are you being here?

You can not believe in gender identity, I don’t care. But be respectful to your colleagues at work. Is that so much to ask for? To literally not be as asshole? Is that what you’re defending - your right to be a flaming asshole to your coworkers without any consequence??