i defend their right to be who they are until my last breath.
Great. I fully support that, and I'd defend that for any trans person. Grab the posters and thermoses, I'll come march with you. Everyone should have the right to be who they are. However someone's right to be who they are does not trump anyone else's right to be who they are. Where I start getting annoyed is where whatever my opinions, my truth and my reality, I am expected to put the other person first however they may behave, and extend a whole lot of courtesy and support that is not reciprocal. I support anyone's right to wave their fist around, but that right ends at my nose.
I happily use the pronouns of choice for my FtM friend, although sadly it's apparent if you love him that trans has been a refuge from a childhood of abuse and horrible mental illness. I'm currently gritting my teeth and watching him wreck his body with testosterone and dreading the day he realises - and sadly he will - that this hasn't been the magic wand he so hopes it will. At gut level he is a very unhappy woman, not a man.
I will gladly use chosen pronouns on meeting people because many will be people who just want to get on with their lives and it's a case of mutual courtesy, it's part of respecting them as a person. Most of those people will continue to be part of a mutually respectful relationship and that's fine. However my patience for a friend's child who posted a 15 minute video on facebook for all of us on their chosen pronouns (after 15 minutes of startlingly self absorbed lecturing the verdict was that it changed from day to day and we need to ask every time and go along with today's decision) is now very short. I just don't have the time on a day to day basis to indulge someone who intends to make themselves that hard work for others. I would be very happy to follow a request about pronouns from a colleague on first beginning work from them or if it was a rare change of choice, but would not be ok with a 15 minute block at the beginning of every meeting to discuss their pronouns and if they'd changed since last time.
Up until very recently I felt even with MfT TRAs who are of the autogynephile type of transgender, use what bits of the agenda suit them in the moment (which I feel is extremely exploitative of people with rapid onset or early gender dysphoria) and issue rape and death threats to women as thoughtlessly as they say hello and goodbye, and whose expression of their beliefs is openly about enforcing compliance, erasure of women and male entitlement, that it was still important to be polite and civilised in discussing these issues. My mind has changed on that. I won't enable this, I won't tolerate this. As soon as someone unleashes this disrespect and contempt at me, the social contract is broken and I won't be a slave to it and embrace an obediently subservient role to it. If someone was behaving this rudely and badly face to face and I was dealing with a six foot plus individual who was going to demand I performed validation services despite their behaviour, or 'send me home in an ambulance' then I'd need my brains tested to inform them that their plan today announced on facebook to fuck up a terf had come true. Instead I would get the fuck out of dodge the same way I would get away from a drunk in a pub intent on starting a fight. It would not be in any way a gesture of respect.
It is a courtesy and gesture of respect to use someone's pronouns of choice when part of every day interaction with someone inside the normal social contract. However in situations where it's pushed and enforced by threat by a man in the name of making women subordinate it becomes being forced to speak a lie, and I am very uncomfortable with that.