How can one accept or reject a thing without understanding what it is they are accepting? Is not immediately changing the way one speaks without a reason or even an explicit request equivalent to denying someone’s identity? I don’t think my discomfort with neopronouns is because I reject anyone’s identity. I don’t even understand what such a person’s identity is. Unlike established pronouns, neopronouns do not have any meaning at all to me because I’ve never heard them before and no one has defined them. What do they signify? I assume something different for each one, so what is it? I’ve always been careful with my language, so using words without a clear understanding of their meaning makes me uncomfortable.

Language is a very meaningful topic for people. Both for the speaker and the spoken to. We have all been acculturated to speak in a certain way, and to understand the meanings of such speech in a certain way. I don’t think asking people to change the way they speak is as trivial as you seem to imply. Nor is declining to change the way one speaks the same as saying “I reject your identity”, unless such a meaning is intended.

And of course I understand that someone may not want to have this (or any) conversation. But I also feel that you can’t expect people to change without them understanding why they need to change. Most people hate change, it’s just human nature. So if you choose not to educate people, you’ll have to accept that they remain ignorant until such time as someone takes on that burden.