It is. You don’t call someone something they find that insulting on accident or without malice.

Just because you have decided this, doesn't make it so. Take me as an example. ESL. Did not know the importance of a simple space. Could have called someone a "transwoman" without knowing that they found it to be incredibly insulting.

So you are fine with someone calling someone fat even though they know they would prefer not to be addressed that way?

If it's the truth, then yes.

No you make the debate impossible because you refuse even basic courtesy of not openly insulting the opposite side.

We have been debating this one word that you consider an insult the entire time, and I have not used it against you once. I have done you this 'courtesy', now you do me one by not accusing me of things I obviously didn't do.

Not at all. It’s my present and I embrace it. You want me defined by a deeply unpleasant past.

I don't "want" to define you by anything. None of use have a choice in this, we're all defined by the exact same thing.

You know very well it’s an insult to call a trans women a man.

So you're accusing me of lying.

You just don’t care.

Stop assuming what other people think and feel. You're obviously not good at it.

And whatever you are a free person, but you can’t expect beneficial dialogue when you openly insult the other people involved.

Again, I have not used this word you consider an insult against you, even though I don't agree that it's an insult. Still, I haven't gotten a beneficial dialogue. Instead you have accused me multiple times of things I did not say or do. Clearly, you agree that this is not my fault because I have played by the rules. The only other person left in this conversation is you.